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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effacement

Thinning of the cervix during labor.
EEG

Electroencephalogram.
edema

Buildup of excessive fluid around the cells in the body.
eczema

A rash characterized by itching, scaling, swelling and oozing. A common allergic reaction.
ectropion

An outward turning of the eyelid.
ectopic pregnancy

When the fertilized egg is implanted and develops outside of the uterus.
eclampsia

An attack of convulsions. Particularly used to describe toxemia (toxins in the blood) of pregnancy.
ECG

Electrocardiogram.
ecchymosis

A collection of blood in the tissues causing a black and blue, or yellow, area.
eardrum

The tympanic membrane that’s visible in the ear. It vibrates in response to sound waves.
dyspnea

Labored breathing.
dysphagia

Difficulty swallowing.
dyspepsia

Indigestion.
dysmenorrhea

Painful menstruation.
dysentery

Infection of the intestine resulting in severe diarrhea and cramps, frequently associated with blood or mucus in the stools.
dwarfism

A deficiency of growth hormone resulting in short stature.
Dupuytren's contracture

Scarring of the palmar ligament in the hand, causing progressive curling of one or more fingers and a thickening of…
duodenum

The first part of the small intestine that begins at the stomach and is the entry point for the pancreatic…
duodenal

Having to do with the duodenum.
duct

A channel or passage through which fluids move.
dropsy

Abnormal buildup of fluid in tissues or a body cavity.