| a prefix meaning “within,” used in the formation of compound words: intramural. |
| intra- pref. Within: intraocular. [Latin intrā-, from intrā; see en in Indo-European roots.] |
intra- pref.
Within: intramedullary.
| intra-
A prefix meaning "inside" or "within," as in intravenous, within a vein. |