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Kids' Medical Dictionary

  • Word! Abdominals Word! Abdominals

    Sometimes called abs, these are the muscles in front of your abdomen, the area below your chest and above your belly button.

  • Word! Abrasion Word! Abrasion

    Ever get an abrasion from falling off a bike or a swing?

  • Word! Abscess Word! Abscess

    An abscess is a collection of pus that happens sometimes when the body is fighting an infection.

  • Word! Acne Word! Acne

    Acne is the name for those red bumps called pimples that a lot of kids and teens get on their skin.

  • Word! Addiction Word! Addiction

    An addiction is an urge to do something that is hard to control or stop.

  • Word! Adenovirus Word! Adenovirus

    An adenovirus is a germ that can cause a sore throat, cough, or runny nose.

  • Word! ADHD Word! ADHD

    ADHD is short for attention deficit hyperactivity disorder.

  • Word! Aerobic Activity Word! Aerobic Activity

    Get ready for a workout!

  • Word! AIDS Word! AIDS

    AIDS is a disease caused by a virus that weakens the body's immune system.

  • Word! Airway Obstruction Word! Airway Obstruction

    When something keeps the air from moving in and out of the airways in your lungs, it's called an airway obstruction.

  • Word! Airways Word! Airways

    The airways in your lungs are like tubes or straws.

  • Word! Alcoholism Word! Alcoholism

    Alcoholism means that someone frequently drinks too much alcohol (such as beer, wine, or liquor) and can't stop.

  • Word! Alignment Word! Alignment

    Alignment means to bring into line.

  • Word! Allergen Word! Allergen

    An allergen is a medical word for anything that causes an allergic reaction.

  • Word! Allergist Word! Allergist

    Allergists are special doctors who help people who are allergic to things like animals, grass, pollen, dust, and even foods.

  • Word! Allergy Word! Allergy

    Achoo! Many things can trigger allergies, like pollen, certain animals, foods, or a bee sting.

  • Word! Allergy Shots and Immunotherapy Word! Allergy Shots and Immunotherapy

    Imagine if you were always sneezing because you were allergic to something.

  • Word! Allergy-Triggered Asthma Word! Allergy-Triggered Asthma

    Most kids who have asthma also have some kind of allergy, too.

  • Word! Alzheimer's Disease Word! Alzheimer's Disease

    Alzheimer's disease is a condition that can make older adults have trouble remembering things.

  • Word! Amputate Word! Amputate

    To amputate something is to cut it off.

  • Word! Anemia Word! Anemia

    People who have anemia have fewer red blood cells than normal, which can make them feel tired because not enough oxygen is getting to their bodies' cells.

  • Word! Anesthesia Word! Anesthesia

    Anesthesia is medicine that doctors give to make people feel comfortable when they're having surgery, stitches, or other things that might be painful.

  • Word! Animal Dander Word! Animal Dander

    All warm-blooded animals shed tiny flakes from their skin. This is called dander.

  • Word! Anorexia Nervosa Word! Anorexia Nervosa

    Anorexia nervosa is an eating disorder that makes people very afraid of gaining weight.

  • Word! Anterior Cruciate Ligament (ACL) Injuries Word! Anterior Cruciate Ligament (ACL) Injuries

    Anterior cruciate ligament injuries damage a strong band of tissue that helps keep the knee stable.

  • Word! Antibiotics Word! Antibiotics

    These awesome medicines attack bacteria that make you sick.

  • Word! Antihistamines Word! Antihistamines

    Antihistamines are medicines that block allergy symptoms.

  • Word! Anus Word! Anus

    The anus is the opening where your bowel movements (also known as poop) come out.

  • Word! Appendicitis Word! Appendicitis

    Appendicitis happens when a part of the digestive system called the appendix gets inflamed or swells up.

  • Word! Appendix Word! Appendix

    The appendix is a small sac attached to the large intestine.

  • Word! Arteries and Veins Word! Arteries and Veins

    Your body has a highway system all its own that sends blood to and from your body parts.

  • Word! Arthritis Word! Arthritis

    This is what happens when joints - the places where bones meet - get painful, swollen, and stiff.

  • Word! Asthma Word! Asthma

    Someone with asthma can have trouble breathing because of problems with the airways, the tubes that carry air into the lungs.

  • Word! Asthma Action Plan Word! Asthma Action Plan

    Lots of stuff goes more smoothly when you have a plan - and that includes dealing with asthma.

  • Word! Asthma Flare-Up Word! Asthma Flare-Up

    When a person has a lot of trouble with wheezing, coughing, or shortness of breath, it's called an asthma flare-up, or attack.

  • Word! Astigmatism Word! Astigmatism

    If you take a good look at your eye, you might barely see your cornea, the clear outer covering of the eye.

  • Word! Astringents Word! Astringents

    If your skin is oilier than normal, you might want to use an astringent.

  • Word! Autism Word! Autism

    Autism is a brain problem that makes it hard for kids to understand the world around them.

  • Word! Autoimmunity Word! Autoimmunity

    Your immune system fights infections and illnesses. But sometimes the immune system makes a mistake and attacks part of the body. This is called autoimmunity.

  • Word! Bacteria Word! Bacteria

    If you're feeling crummy, it's probably because nasty bacteria or some other germs have gotten into your body and made you sick.

  • Word! Bell's Palsy Word! Bell's Palsy

    Bell's palsy is a condition that causes problems with the nerves in a person's face.

  • Word! Beta Cells Word! Beta Cells

    Beta cells make insulin, a hormone that controls the level of glucose (a type of sugar) in the blood.

  • Word! Biopsy Word! Biopsy

    Sometimes, when doctors are not sure what's wrong with a part of your body, they might decide to do a test called a biopsy.

  • Word! Blackhead Word! Blackhead

    People with acne may have different types of bumps on their skin.

  • Word! Blood Bank Word! Blood Bank

    Blood banks collect and store blood, which healthy people donate.

  • Word! Blood Glucose Level Word! Blood Glucose Level

    Blood glucose level is the amount of glucose in the blood.

  • Word! Blood Glucose Meter Word! Blood Glucose Meter

    A blood glucose meter is a small, portable machine that's used to check how much glucose (a type of sugar) is in the blood (also known as the blood glucose level).

  • Word! Blood Pressure Word! Blood Pressure

    When you go to the doctor, a nurse might put a band around part of your arm and pump air into the band, blowing it up like a balloon.

  • Word! Blood Type Word! Blood Type

    Every person has a blood type.

  • Word! Body Type Word! Body Type

    Bodies come in all shapes and sizes, and that's why we have different body types.

  • Word! Bolus Word! Bolus

    For someone with diabetes, a bolus means a single, large dose of insulin taken to handle a rise in blood glucose (a type of sugar).

  • Word! Bone Marrow Word! Bone Marrow

    Bone marrow is a thick, spongy kind of jelly inside your bones.

  • Word! Boogers Word! Boogers

    Boogers are made of dried mucus, dust, pollen, and dirt that the nose keeps out of the lungs.

  • Word! Borborygmus Word! Borborygmus

    Borborygmus is the growling sound stomachs make, especially when they're hungry.

  • Word! Bowels Word! Bowels

    Bowels are your intestines, and bowel movements are the stuff that's in them (otherwise known as poop).

  • Word! Braces Word! Braces

    If your teeth aren't straight, you can go to an orthodontist (a special kind of dentist) to get braces.

  • Word! Bronchial Tubes Word! Bronchial Tubes

    These tubes, or airways, let air in and out of your lungs, so you can breathe.

  • Word! Bronchiolitis Word! Bronchiolitis

    Bronchiolitis is an infection that affects tiny airways in the lungs, which can make it hard to breathe.

  • Word! Bronchoconstriction Word! Bronchoconstriction

    Actually, bronchoconstriction affects the airways in a person's lungs.

  • Word! Bronchodilator Word! Bronchodilator

    A person with asthma may need to take a medication called a bronchodilator - something that dilates (a fancy word for opens) the airways, or bronchial tubes.

  • Word! Bruise Word! Bruise

    When you bang a part of your body against something, your skin might turn different colors where you bumped it.

  • Word! Bruxism Word! Bruxism

    Take a bite out of this - bruxism is the word for grinding your teeth, usually during sleep.

  • Word! Burn, First-Degree Word! Burn, First-Degree

    A first-degree burn is one that only hurts the top layer of skin.

  • Word! Burn, Second-Degree Word! Burn, Second-Degree

    A second-degree burn is one that hurts the top two layers of skin.

  • Word! Burn, Third-Degree Word! Burn, Third-Degree

    A third-degree burn is one that damages all the layers of the skin and the tissue beneath the skin.

  • Word! Dandruff Word! Dandruff

    Dandruff is flakes of dead skin on your head that come loose all the time, but especially when you scratch your head, brush your hair, or pull a shirt over your head.

  • Word! Decongestants Word! Decongestants

    Hooray for decongestants! They're medicines that keep your nose from being stuffy.

  • Word! Dehydration Word! Dehydration

    Don't sweat this long word!

  • Word! Depressant Word! Depressant

    Depressants are a kind of drug that, when used as prescribed by a doctor, can help relax muscles or calm nerves.

  • Word! Depression Word! Depression

    It's normal to feel sad sometimes, but if you feel that way for a long time, and you never feel happy, it's called depression.

  • Word! Dermatitis Word! Dermatitis

    Dermatitis is an irritation or swelling of the skin - in other words, a skin rash.

  • Word! Dermatologist Word! Dermatologist

    A special doctor called a dermatologist knows a lot about skin.

  • Word! Diabetes Mellitus Word! Diabetes Mellitus

    Diabetes mellitus is sometimes called "sugar diabetes." When someone has diabetes, his or her body doesn't use glucose properly.

  • Word! Diagnosis Word! Diagnosis

    The word diagnosis is a fancy name for how doctors figure out what's making you sick.

  • Word! Diaphragm Word! Diaphragm

    Ever get the hiccups? Don't worry - it's just your diaphragm doing something different!

  • Word! Diarrhea Word! Diarrhea

    If you've ever had a bad time in the bathroom, then you know what this is.

  • Word! Dietitian Word! Dietitian

    A dietitian knows a lot about food and healthy eating.

  • Word! Disinfectants Word! Disinfectants

    Disinfectants are germ busters!

  • Word! Dislocation Word! Dislocation

    We all have places on our bodies that bend, like elbows and knees.

  • Word! DNA Word! DNA

    Your body is amazing and complicated.

  • Word! Down Syndrome Word! Down Syndrome

    Down syndrome is a condition that affects the way a baby's body and brain develop. Kids with Down syndrome usually have trouble learning.

  • Word! Dust Mites Word! Dust Mites

    Dust mites are teeny, tiny bugs that live in household dust.

  • Word! Dyslexia Word! Dyslexia

    Wha tifev eryth inglo ooked lik ethis whe nyo utrie dtoread?

  • Word! Farsighted Word! Farsighted

    If it's easy for you to see things far away but you have trouble seeing things that are close, you might be farsighted.

  • Word! Fats Word! Fats

    Like carbohydrates and proteins, fats are one of the three main components of the food you eat.

  • Word! Fatty Acids Word! Fatty Acids

    Like gas for a car, glucose is fuel for your cells. But if glucose isn't available, fatty acids may be used instead.

  • Word! Fever Word! Fever

    You've probably noticed that sometimes when you're sick, you feel really hot one minute and then freezing cold the next.

  • Word! Fiber Word! Fiber

    Foods with fiber are really good for you and your bowels!

  • Word! Floss Word! Floss

    Flossing each day keeps the dentist away.

  • Word! Flu Word! Flu

    The flu is a virus that can make you sick for a week or longer.

  • Word! Fluoride Word! Fluoride

    This is the fantastic mineral that can help your teeth stay strong and look super!

  • Word! Foreign Body Word! Foreign Body

    A foreign body is anything that gets into your body that doesn't belong there.

  • Word! Fracture Word! Fracture

    When a bone breaks, it's called a fracture.

  • Word! Frenulum Word! Frenulum

    You've got a friend in your frenulum, the piece of skin that attaches your tongue to the bottom of your mouth.

  • Word! Frostbite Word! Frostbite

    Brrrrr . . . pass the hat and mittens, please!

  • Word! Gait Abnormality Word! Gait Abnormality

    A gait abnormality is when someone walks in an unusual way.

  • Word! Gastric Juices Word! Gastric Juices

    You don't drink these juices with your breakfast!

  • Word! Gastritis Word! Gastritis

    Gastritis is irritation and swelling of the stomach lining.

  • Word! Gastroenteritis Word! Gastroenteritis

    Feeling sick to your stomach?

  • Word! Genes Word! Genes

    These aren't the blue pants that hang in your closet!

  • Word! Genetics Word! Genetics

    Genetics is the study of the way physical traits and characteristics get passed down from one generation to the next.

  • Word! GERD Word! GERD

    GERD, or gastroesophageal reflux disease, is when the stomach's contents flow back up into the esophagus

  • Word! Gingivitis Word! Gingivitis

    Got gums? Then you have to protect them against gingivitis, the word for gum disease.

  • Word! Glucagon Word! Glucagon

    Glucagon is a hormone that raises the level of glucose (a type of sugar) in the blood.

  • Word! Glucose Word! Glucose

    When you eat, your body turns the food into a sugar called glucose. Like gas for a car, glucose provides fuel for your cells.

  • Word! Gluteus Maximus Word! Gluteus Maximus

    You don't have to look too far for this body part - you're sitting on it!

  • Word! Glycemic Index Word! Glycemic Index

    The body breaks down most carbohydrates from the foods we eat and changes them to a type of sugar called glucose. The glycemic index is a way of measuring how fast this occurs and how a food affects blood glucose levels.

  • Word! Glycogen Word! Glycogen

    When the body has extra glucose, it stores it in the liver and muscles. This stored form of glucose is called glycogen.

  • Word! Glycosylated Hemoglobin Test (Hemoglobin A1c) Word! Glycosylated Hemoglobin Test (Hemoglobin A1c)

    This blood test can tell someone with diabetes if his or her diabetes is under control or out of control.

  • Word! Grieving Word! Grieving

    If you've ever been really sad, you might have been grieving.

  • Word! Growth Hormone Word! Growth Hormone

    Growth hormone is a major player in normal growth, like when your legs get longer and suddenly all your pants are too short!

  • Word! Gums Word! Gums

    Believe it or not, you always have gum in your mouth. No, not chewing gum!

  • Word! Gurney Word! Gurney

    A gurney is a hospital bed with wheels that makes it easy to move patients around.

  • Word! Gynecologist Word! Gynecologist

    A gynecologist is a doctor who knows all about women's and girls' bodies.

  • Word! Hand, Foot, and Mouth Disease Word! Hand, Foot, and Mouth Disease

    Hand, foot, and mouth disease can cause fever and blisters on the hands and feet and in the mouth and throat.

  • Word! Hay Fever Word! Hay Fever

    No, hay fever's not when a horse is sick!

  • Word! Headache Word! Headache

    Most headaches happen in the nerves, blood vessels, and muscles that cover your head and neck.

  • Word! Hearing Loss Word! Hearing Loss

    Hearing loss happens when one or more parts of your ears don't work and you can't hear perfectly.

  • Word! Heat Exhaustion Word! Heat Exhaustion

    Super hot in summer? Then watch out for this.

  • Word! Hemangioma Word! Hemangioma

    This is a big word for a type of birthmark.

  • Word! Hematoma Word! Hematoma

    Hematoma is just a fancy name for bruise, or black and blue mark.

  • Word! Hemophilia Word! Hemophilia

    People with hemophilia have blood that doesn't clot the way it should. That means that they bruise and bleed easily.

  • Word! Heredity Word! Heredity

    If people say you look like your parents, they're probably talking about heredity.

  • Word! Herpes Zoster Word! Herpes Zoster

    Herpes zoster, also called shingles, causes a rash with blisters on the body and is very painful.

  • Word! Histamine Word! Histamine

    Histamine is a substance in the body that's released during an allergic reaction.

  • Word! Hives Word! Hives

    Hives are pink or red bumps or slightly raised patches of skin that can appear due to an allergic reaction.

  • Word! Hormone Word! Hormone

    Hormones are special chemicals your body makes to help it do certain things - like grow up!

  • Word! Hormones Word! Hormones

    Hormones are special chemicals your body makes to help it do certain things - like grow up!

  • Word! Humidifier Word! Humidifier

    If you get nosebleeds a lot or your nose often feels dry, it may be time to get a humidifier.

  • Word! Hydrocephalus Word! Hydrocephalus

    Hydrocephalus happens when the fluid that cushions the brain builds up inside the head.

  • Word! Hydrocortisone Word! Hydrocortisone

    Hydrocortisone is medicine that helps itchy skin feel better.

  • Word! Hydrogen Peroxide Word! Hydrogen Peroxide

    Hydrogen peroxide is a chemical that can clean your cuts and scrapes.

  • Word! Hyperglycemia Word! Hyperglycemia

    Glucose (a type of sugar) is the body's main energy source. Hyperglycemia occurs when the levels get too high.

  • Word! Hyperopia Word! Hyperopia

    Having hyperopia is also known as being farsighted, which means you can see things far away, but have trouble seeing objects up close, like the words in a book.

  • Word! Hyperventilate Word! Hyperventilate

    When you hyperventilate, you breathe too deeply and too quickly. This can make you feel lightheaded or short of breath.

  • Word! Hypoglycemia Word! Hypoglycemia

    Glucose (a type of sugar) is the body's main energy source. Hypoglycemia occurs when the levels get too low.

  • Word! Hypothermia Word! Hypothermia

    Hypothermia is when the body gets so cold that it can't warm itself up again.

  • Word! Ibuprofen Word! Ibuprofen

    If you've ever had the the flu, you might remember that awful achy feeling.

  • Word! ICU Word! ICU

    Short for intensive care unit, this is a place in the hospital where people can recover from very serious illnesses, accidents, or operations.

  • Word! Ileus Word! Ileus

    An ileus is when the intestines stop working and don't move food, fluid, and gas the way they are supposed to.

  • Word! Immune System Word! Immune System

    This body system, which includes white blood cells and lymph nodes, helps protect your body from disease.

  • Word! Immunizations Word! Immunizations

    This is the long word for what most kids know as shots.

  • Word! Immunotherapy and Allergy Shots Word! Immunotherapy and Allergy Shots

    Imagine if you were always sneezing because you were allergic to something.

  • Word! Impetigo Word! Impetigo

    Impetigo is a skin infection that can happen when bacteria get inside your skin from a cut.

  • Word! Infection Word! Infection

    When germs get inside your body, they can multiply and cause an infection.

  • Word! Influenza Word! Influenza

    Feeling suddenly feverish, achy, and crummy all over?

  • Word! Inhale Word! Inhale

    You're doing it now . . . and now . . . and now . . . and now!

  • Word! Inhaler Word! Inhaler

    An inhaler, also called a puffer, is a plastic tube that holds a container of medicine that comes out in a spray and is breathed into the lungs.

  • Word! Injection Word! Injection

    An injection is when the doctor uses a needle to put medicine or a vaccine into your body.

  • Word! Insulin Word! Insulin

    If someone has diabetes, he or she has trouble with a hormone called insulin.

  • Word! Insulin Injections Word! Insulin Injections

    Insulin is an important hormone that keeps your body working. If a person doesn't make enough of this substance, he or she may need to get insulin injections.

  • Word! Insulin Pump Word! Insulin Pump

    A person needs the hormone insulin so the body can function properly. If a person's body doesn't make enough insulin, one way to get it is through an insulin pump.

  • Word! Insulin Resistance Word! Insulin Resistance

    Even though the pancreas is still making insulin, the body doesn't let insulin do its job as well and it's harder for glucose to get into the cells. This is called insulin resistance.

  • Word! Intensive Care Unit Word! Intensive Care Unit

    The intensive care unit, or ICU, is a special place in the hospital where people can recover from very serious illnesses, accidents, or operations.

  • Word! Involuntary Muscle Word! Involuntary Muscle

    You don't have any say over what this kind of muscle does and when.

  • Word! Iris Word! Iris

    Hey there, bright eyes!

  • Word! Irritable Bowel Syndrome Word! Irritable Bowel Syndrome

    Irritable bowel syndrome happens when the muscles in the large intestine have trouble doing their job.

  • Word! Islet Cells Word! Islet Cells

    The pancreas contains clusters of cells that produce hormones. These clusters are known as islets.

  • Word! IV Word! IV

    IV is actually short for intravenous.

  • Word! Kawasaki Disease Word! Kawasaki Disease

    Kawasaki disease is pretty rare. Kids who have it may have a fever for up to two weeks.

  • Word! Keratin Word! Keratin

    Now hair this!

  • Word! Ketoacidosis Word! Ketoacidosis

    Ketoacidosis, a condition that can happen to people with diabetes, occurs when the body uses fat instead of glucose for fuel.

  • Word! Ketones Word! Ketones

    When fat is broken down, chemicals called ketones are produced.

  • Word! Kidney Word! Kidney

    The kidneys are a pair of organs that filter waste materials out of the blood.

  • Word! Kidney Stones Word! Kidney Stones

    kidney stones, renal stones, kidneys, renal system, urinary tract, urinary system, uereters, bladder, urine, pee, calcium, urethra, blood in the urine, bloody urine, can't pee, peeing problems

  • Word! Lacrimal Glands Word! Lacrimal Glands

    Boo hoo hoo, crying is what these parts help you do!

  • Word! Laparoscopy Word! Laparoscopy

    Laparoscopy sounds a little scary at first, but it's actually pretty cool.

  • Word! Larynx Word! Larynx

    If you can sing "la la la," then you have a larynx!

  • Word! Laxatives Word! Laxatives

    Laxatives are medicines that help you out when your bowels aren't moving.

  • Word! Lens Word! Lens

    The lens is the part of the eye that focuses on what you see.

  • Word! Ligament Word! Ligament

    Ligaments are tough bands of tissue that hold your bones together at your joints.

  • Word! Lung Function Tests Word! Lung Function Tests

    How well do your lungs function? In other words, how well are you breathing?

  • Word! Lunula Word! Lunula

    Take a look at your thumb and you'll see this: it's the light half-moon shape at the very bottom of your nail.

  • Word! Lyme Disease Word! Lyme Disease

    Lyme disease is an infection that can make you feel tired and sore all over. People get Lyme disease from being bitten by infected ticks.

  • Word! Lymph Word! Lymph

    Lymph is a clear fluid that flows through its own vessels located throughout the body.

  • Word! Lymph Node Word! Lymph Node

    Your wonderful lymph nodes! Lymph nodes are little round or bean-shaped bumps that you usually can't feel unless they become swollen.

  • Word! Malocclusion Word! Malocclusion

    Malocclusion is a word that dentists and orthodontists use when your teeth don't come together like they should.

  • Word! Melanin Word! Melanin

    Ever wonder where your skin gets its color?

  • Word! Meninigitis Word! Meninigitis

    The meninges cover and protect the brain and spinal cord. Meningitis happens when the meninges swell or get irritated.

  • Word! Menstruation Word! Menstruation

    Menstruation is a period — the 2 to 7 days each month that a girl or woman experiences menstrual flow.

  • Word! Microscope Word! Microscope

    A microscope is a very powerful magnifying glass.

  • Word! Migraine Word! Migraine

    A migraine is a really bad kind of headache that can make you feel dizzy or even sick to your stomach.

  • Word! Mononucleosis Word! Mononucleosis

    People call mononucleosis "kissing disease" because you can get it from someone else's saliva. Mono can make you feel super tired and sick.

  • Word! MRI Word! MRI

    MRI machines take detailed pictures of the insides of people's bodies to help doctors learn what's wrong when there's a problem.

  • Word! Mucous Membrane Word! Mucous Membrane

    Just as skin lines and protects the outside of the body, mucous membranes line and protect the inside of your body.

  • Word! Mucus Word! Mucus

    When you think of mucus, you might think of snot, which is that sticky stuff inside your nose.

  • Word! Multiple Sclerosis Word! Multiple Sclerosis

    When someone has multiple sclerosis, their nerves don't send signals to the brain the way they should.

  • Word! Myalgia Word! Myalgia

    Myalgia is muscle pain — when muscles hurt because of an injury, overuse, or a medical condition.

  • Word! Myopia Word! Myopia

    Myopia is also known as nearsightededness, which means you can see things up close, but have trouble seeing objects far away, like the words on a chalkboard.

  • Word! Nasal Cavity Word! Nasal Cavity

    The nasal cavity is the inside of your nose.

  • Word! Nausea Word! Nausea

    "Ooh, I'm sick to my stomach!" is another way of putting it.

  • Word! Navel Word! Navel

    No doubt about it, every person in the whole world has a navel - a belly button, that is!

  • Word! Nearsighted Word! Nearsighted

    You might be nearsighted if you have no problems seeing things up close but have trouble seeing things that are far away, like the chalkboard when you sit in the back of the classroom.

  • Word! Nebulizer Word! Nebulizer

    A nebulizer may sound like a space gun, but you don't have to be on a spaceship to use it.

  • Word! Nephropathy Word! Nephropathy

    Kidney disease caused by diabetes is called diabetic nephropathy.

  • Word! Nerves Word! Nerves

    Your nerves are like a bunch of wires or cables that send signals back and forth between your brain and the rest of your body.

  • Word! Nervous System Word! Nervous System

    The nervous system controls everything you do, including breathing, walking, thinking, and feeling.

  • Word! Neurologist Word! Neurologist

    A neurologist is a doctor who studies the nervous system.

  • Word! Neuropathy Word! Neuropathy

    Neuropathy is the medical word for disease of the nervous system.

  • Word! Nicotine Word! Nicotine

    This chemical is found in cigarettes and is the reason why kids (and others) get hooked on the smoking habit.

  • Word! Night Guard Word! Night Guard

    Nope, these aren't people who protect you when it gets dark!

  • Word! Nits Word! Nits

    Many kids have had nasty nits.

  • Word! Nutrition Word! Nutrition

    Nutrition is the study of food and how it works in your body.

  • Word! Palate Word! Palate

    You've probably tickled this part of your mouth with your tongue before.

  • Word! Palpitations Word! Palpitations

    Palpitations can make it feel like your heart is racing or fluttering, or that your heart has skipped a beat.

  • Word! Pancreas Word! Pancreas

    The pancreas is a long, flat gland in your belly.

  • Word! Papillae Word! Papillae

    Papillae are the little bumps on the top of your tongue that help grip food while your teeth are chewing.

  • Word! Peak Flow Meter Word! Peak Flow Meter

    Lots of kids who have asthma use a special tool called a peak flow meter to measure how quickly they can push air out of their lungs.

  • Word! Pediatric Endocrinologist Word! Pediatric Endocrinologist

    This is the name for the type of doctor who deals with hormones, those special chemical substances your body produces that make things happen all over the body (especially during puberty).

  • Word! Pediatrician Word! Pediatrician

    A pediatrician is a doctor who takes care of babies, kids, and teens.

  • Word! Peritonitis Word! Peritonitis

    Peritonitis is when the tissue that covers the inside wall of abdomen gets swollen and irritated, usually due to an infection.

  • Word! Perspiration Word! Perspiration

    Perspiration is another name for sweat, the stuff that comes out of your skin through tiny holes called pores.

  • Word! Petroleum Jelly Word! Petroleum Jelly

    Don't put this jelly on your sandwich.

  • Word! Pilomotor Reflex Word! Pilomotor Reflex

    If you've ever been cold or scared, you've seen your pilomotor reflex in action.

  • Word! Pimple Word! Pimple

    Your skin has many tiny holes called pores.

  • Word! Pinna Word! Pinna

    What? What? Better put your hand around your pinna to hear this better.

  • Word! Plaque Word! Plaque

    Stand back - it's plaque!

  • Word! Platelets Word! Platelets

    Your blood contains many tiny cells called platelets.

  • Word! Pneumonia Word! Pneumonia

    Pneumonia is an infection of the lungs, usually caused by viruses or bacteria.

  • Word! Pollen Word! Pollen

    Pollen is a fine powder produced by certain plants.

  • Word! Polydipsia Word! Polydipsia

    If someone's diabetes isn't under control, he or she might be really thirsty and drink a lot of fluids. Polydipsia is the medical word for this.

  • Word! Polyphagia Word! Polyphagia

    Polyphagia is the medical word for eating very large amounts of food.

  • Word! Polyuria Word! Polyuria

    Someone who has uncontrolled diabetes may urinate (pee) a lot. Polyuria is the medial word for this.

  • Word! Pregnant Word! Pregnant

    When a woman is pregnant, it means that there is a baby growing inside her.

  • Word! Prosthesis Word! Prosthesis

    A prosthesis is a fake body part.

  • Word! Protein Word! Protein

    Protein builds, maintains, and replaces the tissues in your body. You can get it from yummy foods like eggs, nuts, beans, fish, meat, and milk.

  • Word! Puberty Word! Puberty

    Everyone goes through puberty, even though it sometimes feels like you're the only one!

  • Word! Pulmonary Word! Pulmonary

    Breathe in . . . breathe out . . . and feel your pulmonary power!

  • Word! Pulmonologist Word! Pulmonologist

    A pulmonologist is a doctor who specializes in lungs and breathing.

  • Word! Pulse Word! Pulse

    Your beating heart creates a pulse.

  • Word! Pupil Word! Pupil

    Pupils are in charge of how much light goes into your eye.

  • Word! Quick-Relief Medicines Word! Quick-Relief Medicines

    Quick-relief medicines are a type of asthma medicine that works quickly.

  • Word! Radiologist Word! Radiologist

    When a kid gets an X-ray or a CT scan (two types of pictures taken of the inside of the body), those funny-looking pictures can be tough to understand.

  • Word! Rash Word! Rash

    A rash is when skin gets irritated — red, bumpy, scaly, blistered, or itchy. Lots of things can cause rashes.

  • Word! Red Blood Cells Word! Red Blood Cells

    Red blood cells have the important job of carrying oxygen.

  • Word! REM Word! REM

    This is short for rapid eye movement, the stage of sleep when your eyes move back and forth under your closed eyelids and you have dreams.

  • Word! Respiratory Syncytial Virus Word! Respiratory Syncytial Virus

    Respiratory syncytial virus, or RSV, is an infection of the lungs and breathing passages.

  • Word! Retainer Word! Retainer

    Your teeth won't go far, but they can move after your braces are removed.

  • Word! Retina Word! Retina

    The retina is at the back of your eye and it has light-sensitive cells called rods and cones.

  • Word! Retinopathy Word! Retinopathy

    Retinopathy is the medical word for disease of the retina.

  • Word! Retractions Word! Retractions

    Retractions are a sign someone is working hard to breathe.

  • Word! Rheumatologist Word! Rheumatologist

    This is a special kind of doctor who deals with rheumatological problems - that's the big name for conditions that involve swelling and pain in muscles and joints.

  • Word! Rhinitis Word! Rhinitis

    Rhinitis is irritation and swelling of the lining of the nose - also known as a runny nose.

  • Word! Rhinovirus Word! Rhinovirus

    No, this isn't a rhinoceros with the sniffles.

  • Word! Ringworm Word! Ringworm

    Ringworm isn't a worm at all. It's an infection on the skin or nails caused by a fungus.

  • Word! Roseola Word! Roseola

    Roseola is a sickness that mostly affects babies and toddlers. It can cause a high fever and a rash on the belly or chest.

  • Word! Rotavirus Word! Rotavirus

    Rotavirus is a virus that affects the digestive system. It can make people throw up a lot or have bad diarrhea.

  • Word! Rx Word! Rx

    This is short for the word prescription.

  • Word! Saliva Word! Saliva

    Slimy! Slippery! Saliva is none other than spit, the clear liquid in your mouth that's made of water and other chemicals.

  • Word! Scab Word! Scab

    When you get a cut or scrape your blood forms a clot to stop the bleeding. When the clot dries and hardens it's called a scab.

  • Word! Scabies Word! Scabies

    Scabies is an itchy skin problem caused by teeny mites that dig tunnels underneath the skin's surface.

  • Word! Scar Word! Scar

    A scar is a mark left on your skin from a cut or wound that has healed.

  • Word! Scarlet Fever Word! Scarlet Fever

    Scarlet fever is an infection caused by the same bacteria that cause strep throat. It's called scarlet fever because it causes a red, bumpy rash over most of the body.

  • Word! Sclera Word! Sclera

    The sclera is the white part of your eye.

  • Word! Scoliosis Word! Scoliosis

    Scoliosis is an abnormal curve of the spine, also known as the backbone.

  • Word! Sebaceous Glands Word! Sebaceous Glands

    Sebaceous glands make oil to keep skin soft and smooth.

  • Word! Sebum Word! Sebum

    You can't see it, but it's there. Sebum is your skin's natural oil, and it keeps your skin soft and makes it a bit waterproof.

  • Word! Seizure Word! Seizure

    You might hear a seizure called a convulsion, fit, or spell.

  • Word! Semicircular Canals Word! Semicircular Canals

    Your semicircular canals are three tiny, fluid-filled tubes in your inner ear that help you keep your balance.

  • Word! Shingles Word! Shingles

    Shingles is the same virus as the one that gives people chickenpox. It can cause sores or blisters on the body and is very painful.

  • Word! Sinusitis Word! Sinusitis

    Sinusitis is an infection of your sinuses — air-filled spaces found in the bones of the face around the nose.

  • Word! Skin Test Word! Skin Test

    If you think that you might have allergies, a special doctor called an allergist can help figure out what you are allergic to by giving you a skin test.

  • Word! Snot Word! Snot

    Snot, or mucus, is that sticky, slimy stuff inside your nose.

  • Word! Social Worker Word! Social Worker

    A social worker is someone who helps people.

  • Word! Spacer Word! Spacer

    A spacer makes it easier to use an inhaler.

  • Word! Sphenopalatineganglioneuralgia Word! Sphenopalatineganglioneuralgia

    This huge word means an ice cream headache.

  • Word! Spinal Tap Word! Spinal Tap

    A spinal tap is an important test for diagnosing illnesses, such as meningitis.

  • Word! Spirometer Word! Spirometer

    A spirometer is an instrument that measures how well your lungs are working.

  • Word! Sprain Word! Sprain

    A sprain happens when the ligaments in one of your joints gets stretched too far or torn.

  • Word! Stapes Word! Stapes

    The stapes is the body's smallest bone!

  • Word! Stat Word! Stat

    Quick! On the double! Hurry up! Get moving!

  • Word! Sternutation Word! Sternutation

    This is a long word for something that happens in a short time: sneezing!

  • Word! Stethoscope Word! Stethoscope

    When you go to the doctor, he or she will probably use something called a stethoscope to hear the sounds that the inside of your body makes.

  • Word! Strain Word! Strain

    A strain happens when a muscle gets stretched too far.

  • Word! Strep Screen Word! Strep Screen

    If you've ever gone to the doctor with a really sore throat, you may have had a strep screen.

  • Word! Strep Throat Word! Strep Throat

    Strep throat is an infection caused by bacteria.

  • Word! Stress Word! Stress

    Stress is the feeling you get when you're worrying about a big test or when your parents are arguing.

  • Word! Stye Word! Stye

    A stye is a small bump near the edge of the eyelid where the eyelashes are.

  • Word! Sulfites Word! Sulfites

    Sulfites are food preservatives that can cause breathing difficulties in some people with asthma.

  • Word! Surgery Word! Surgery

    When someone you care about is having surgery, it can be scary.

  • Word! Suture Word! Suture

    This is the string that doctors use to sew things together.

  • Word! Symptoms Word! Symptoms

    When you're sick, you usually have symptoms - body changes like a fever that let you know something's not right.

  • Word! Syringe Word! Syringe

    A syringe is the needle a doctor uses to give you a shot or draw blood.

  • Word! Taste Buds Word! Taste Buds

    If you love ice cream, thank your taste buds.

  • Word! Tendons Word! Tendons

    For keeping things together, tendons come in handy!

  • Word! Tinnitus Word! Tinnitus

    Ring, ring, ring! It's not the phone - it's the word for a ringing sound in the ears.

  • Word! Tobacco Word! Tobacco

    Tobacco is a plant that can be smoked in cigarettes, pipes, or cigars.

  • Word! Tonsillectomy Word! Tonsillectomy

    Tonsils are those two bumps on each side of the back of your throat.

  • Word! Tonsillitis Word! Tonsillitis

    Tonsillitis is an infection of the tonsils at the back of your throat.

  • Word! Trachea Word! Trachea

    Your trachea, or windpipe, carries air in and out of your lungs.

  • Word! Tragus Word! Tragus

    That little bump on the outside of your ear canal is called the tragus.

  • Word! Triggers Word! Triggers

    With asthma, a trigger is anything that brings on asthma symptoms, such as coughing, wheezing, and trouble breathing.

  • Word! Tympanogram Word! Tympanogram

    Tympanic membrane is the fancy name for eardrum, so when a doctor wants to find out how your eardrum is working, he or she may get a tympanogram.

  • Word! Vaccine Word! Vaccine

    A vaccine is another word for what most kids call a shot.

  • Word! Varicella Zoster Word! Varicella Zoster

    This is the medical name for the virus that causes chicken pox, which is known for its red, itchy bumps.

  • Word! Veins and Arteries Word! Veins and Arteries

    If you've ever seen a road map, you probably saw many roads going here, there, and everywhere.

  • Word! Vertebrae Word! Vertebrae

    Reach around and feel those bumps in the center of your back.

  • Word! Violence Word! Violence

    Your parents have probably told you not to watch a TV show because it is too violent or that some video games are too violent.

  • Word! Virus Word! Virus

    Viruses are a type of germ. They're very tiny, and when they get inside your body, they can make you sick.

  • Word! Vitreous Body Word! Vitreous Body

    The vitreous body takes up most of the eye and gives the eye its shape.

  • Word! Warts Word! Warts

    A wart is a small area of hardened skin that usually has a bumpy surface.

  • Word! Wheeze Word! Wheeze

    A wheeze is the whistling sound air makes when your breathing tubes are narrowed.

  • Word! White Blood Cells Word! White Blood Cells

    White blood cells are part of the germ-fighting immune system.

  • Word! Whitehead Word! Whitehead

    People with acne may have different types of bumps on their skin.

  • Word! Wisdom Teeth Word! Wisdom Teeth

    You will have learned a lot by the time you get your wisdom teeth, but they don't make you any smarter!

  • Word! Yawn Word! Yawn

    Yawning is when you stretch your mouth open wide.

  • Word! Yeast Infection Word! Yeast Infection

    A yeast infection is a skin infection caused by a fungus called candida. It can cause white spots in the mouth or an itchy, red rash.

  • Word! Yellow Fever Word! Yellow Fever

    Yellow fever is a disease caused by a virus carried by mosquitoes. It's called yellow fever because it can cause jaundice, which turns the skin yellow.

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