Dictionary of Medical Terms

Gain a better understanding of medical terminology by searching our dictionary of more than 1,300 terms.

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encephalitis

A serious infection resulting in inflammation of the brain.
encopresis

Fecal incontinence. Inability to hold feces.
endocarditis

Inflammation or infection of the inside of the heart, often including the heart valves.
endocrine glands

Glands that are ductless and release their secretions directly into the bloodstream.
endometriosis

A condition in which cells from the lining of the uterus are found in other locations within the pelvic cavity…
enema

1. Introduction of fluid into the rectum to bring about a bowel movement. 2. The solution introduced into the rectum…
ENT

The medical specialty of the ear, nose and throat.
enteritis

An inflammation of the intestines that usually causes cramps and diarrhea.
enuresis

Bedwetting.
eosinophil

A type of white blood cell that becomes more abundant in the bloodstream in certain parasitic and allergic conditions.
epidemiology

The study of the causes and control of diseases in human populations.
epidermis

The outermost layer of skin.
epididymis

The elongated structure behind each testicle where sperm are stored.
epiglottis

The flap of cartilage at the base of the tongue that closes the trachea during swallowing to keep food or…
epilepsy

A disorder of the central nervous system that causes convulsions, or seizures.
epinephrine

Adrenaline, a hormone produced in the core of the adrenal glands that’s sometimes used to treat asthma and allergic…
episiotomy

An incision of the perineum (the area between the vagina and anus in women), often performed during labor to minimize…
epistaxis

Nosebleed.
epithelium

The layer of cells covering internal and external surfaces of the body.
erysipelas

A febrile (fever-associated) skin infection caused by a group A hemolytic streptococci.
erythema

Redness of the skin.