pref.
Pronunciation: ' in-tr ə , -( ˌ )trä
Function: prefix
Etymology: Late Latin, from Latin intra, from Old Latin *interus, adjective, inward ― more at INTERIOR
1 a : within < intra galactic> b : during < intra day> c : between layers of < intra dermal>
2 : INTRO- <an intra muscular injection>