Dictionary of Medical Terms

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

Filter By Alphabet

All terms that start with the letter T

Sort By:

triage

A system of assigning priorities of medical treatment based on urgency, severity of injury and chance for survival.
triceps

A muscle of the arm used to extend the forearm.
trichinosis

Infection with a roundworm caused by consumption of larvae in undercooked pork or other infected meat.
trichomoniasis

Infection with Trichomonas protozoa. Frequently causes vaginal itching and discharge in women. It’s usually acquired by sexual contact with an…
tricuspid valve

The heart valve between the right atrium and the right ventricle.
trisomy

The presence of an extra chromosome in addition to the usual pair. Down syndrome is an example of a condition…
truss

A device to keep a hernia in its proper place.
TSH

Thyroid-stimulating hormone. A pituitary hormone that stimulates thyroid hormone production.
tuberculin

A protein injected into the skin to test for tuberculosis infection.
tuberculosis

An infectious disease caused by bacteria and characterized by the formation of tubercles in various tissues of the body, especially…
tumor

Overgrowth of tissue.
tussis

Cough.
tympanic membrane

The eardrum.
typhoid fever

A bacterial infection with Salmonella typhi transmitted by contaminated water, milk or other foods. Proper sanitation and hygiene prevent the…
typhus

An infectious disease spread to people by the bite of ticks, mites, fleas and lice. Typhus is characterized by high…