Main Entry: in·tra-

Pronunciation: \ˈin-trə, -(ˌ)trä\

Function: prefix

Etymology: Late Latin, from Latin intra, from Old Latin *interus, adjective, inward — more at interior

1 a : within <intragalactic> b : during <intraday> c : between layers of <intradermal>
2 : intro- <an intramuscular injection>