intra-

a prefix meaning “within,” used in the formation of compound words:

intramural.

Compare intro-.

Origin

< Late Latin intrā-, representing Latin intrā (adv. and preposition); akin to interior, inter-

Can be confused

inter-, intra-.

British Dictionary definitions for intra-

intra-

prefix

within; inside: intravenous

Word Origin

from Latin intrā on the inside, within; see interior

Word Origin and History for intra-

word-forming element meaning "within, inside, on the inside," from Latin intra "on the inside, within," related to inter "between," from PIE *en-t(e)ro-, from root *en "in" (see in). Commonly opposed to extra-, but the use of intra as a prefix was rare in classical Latin.

intra- in Medicine

intra- pref.
Within: intramedullary.

intra- in Science

intra-
A prefix meaning "inside" or "within," as in intravenous, within a vein.