The Collaborative International Dictionary of English v.0.48:
Intravenous \In`tra*ve"nous\, a. 1. Within the veins. [1913 Webster] 2. Administered by injection into a vein; as, an intravenous antibiotic infusion. [PJC]WordNet (r) 3.0 (2006):
intravenous adj 1: within or by means of a vein; "an intravenous inflammation"; "intravenous feeding" [syn: intravenous, endovenous]