[vas.cu.lar] adj [NL vascularis, fr. L vasculum small vessel, dim. of vas] (1672) 1: of or relating to a channel for the conveyance of a body fluid (as blood of an animal or sap of a plant) or to a system of such channels; also: supplied with or made up of such channels and esp. blood vessels "a ~ tumor" "a ~ system"
2: marked by vigor and ardor: spirited, passionate -- vas.cu.lar.i.ty n