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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All terms that start with the letter U

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ulcer

A localized sore in the skin or mucosal surfaces.
ulcerative colitis

A chronic inflammatory disease of the large intestine characterized by bloody diarrhea.
ulna

The larger of the two bones of the forearm.
umbilical cord

A tough, cord-like structure connecting the fetus to the placenta for nourishment.
umbilicus

The scar at the site of attachment of the umbilical cord. The navel or belly button.
ungual

Having to do with the nails.
uremia

The buildup in the blood of substances normally eliminated in the urine.
ureter

A narrow tube that transfers urine from the kidney to the bladder.
urethra

The tube that allows the bladder to empty outside the body.
urethral stricture

A narrow area of the urethra that blocks the flow of urine.
urethritis

Inflammation or infection of the urethra.
urinary bladder

The organ that serves as a temporary storage place for urine. Also called the bladder.
urine

The fluid composed of water and waste products that’s secreted by the kidneys.
urogenital

Having to do with the urinary system and genitals.
urology

The branch of medicine that deals with the urinary system in women and the urogenital system in men.
uterus

A hollow muscular organ in women where the ovum (egg) is deposited and the embryo and fetus are developed.
uvula

The fleshy mass hanging down from the soft palate above the back of the tongue.