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 I

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intracellular

Within a cell.
intradermal

Within the skin.
intramuscular

Within the muscle.
intrauterine

Within the womb.
intravenous

Within a vein. Intravenous infusion means to direct fluids through a needle or catheter directly into a vein.
intussusception

Telescoping a section of the intestine into an adjoining section.
iris

The colored portion of the eye. It’s a muscle that controls the amount of light entering the pupil.
iritis

Inflammation of the iris.
irrigation

Washing of a body cavity or wound with a stream of water.
ischemia

A lack of blood supply to a body part.
IUD

Intrauterine device. Used for contraception.
IV

Intravenous.
IVP

Intravenous pyelography.