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medical dictionary online

Many terms frequently used in science and medicine are derived from latin words. By combining the root words with, prefixes and suffixes many of the meanings of the terms can be deciphered.

Use the following resources to better understand medical terms:

Medical Roots or Stems
Prefixes commonly used in medical terms
Suffixes commonly used in medical terms

Complete Glossary of Medical Root Words

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eczema inflammation of the skin that causes itching, scaling or sometimes blisters
edema swelling due to the buildup of fluid
electrocardiogram a test that records the electrical activity of the heart and detects heart muscle damage
electrocoagulation procedure that uses a high frequency to harden tissue
electrodesiccation electrosurgery which destroys tissue
electomyogram a test to evaluate nerve and muscle function
electrophysiological study a cardiac catheterization to study electrical current in patients who have arrhythmias
electrosurgery use of high-frequency electrical currents to destroy cancer cells
embolus blood clot that moves
encephalitis viral infection of the brain
endarterectomy surgical removal of plaque or blood clots from within an artery

mucous membrane lining of the inner surface of the uterus that grows during each menstrual cycle and shed in menstrual blood

endorphins biomechanical substances implicated in the alleviation of pain; produced as a result of body stress
endothelium layer of cells that lines the heart, blood vessels and other body cavities
enterocele hernia in the intestine
enteroscopy examination of the small intestine
enterostomy opening into the intestine through the abdominal wall
endothelium layer of cells that lines the heart and blood vessels
enterocele hernia in the instestine
enteroscopy examination of the small instestine
enterostomy opening into the intesting through the abdominal wall
epicardium membrane that covers the heart
erythema nodosum red swellings or sores on lower legs during chrons or ulcerative colitis flareups
esophageal ulcer sore in the esophagus
extensor muscle any muscle that causes the straightenting of a limb
extrinsic asthma asthma that is triggered by an allergic reaction




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