intra. (L. within). A prefix denoting within or inside, as intraneural, within a nerve.
intravenous. Within a vein.
inunction. Administering a drug in ointment form by rubbing into the skin.
inversion. The reversion of the normal position of an organ, turning inward, inside out, etc.
involucrum. An enveloping membrane.
iodide. A compound of iodin with another element, as iodide of potassium.
iodin (iodine). A non-metallic chemical element.
iodoform. A lemon yellow crystalline powder; used as an antiseptic to wounds and sores.
iritis. Inflammation of the iris, the anterior division of the vascular tunic of the eye.
iron. A metallic element.