radicle
rad.i.cle \'rad-i-k*l\ \ra-'dik-y*-l*r\ n [L radicula, dim. of radic-, radix] 1: the lower part of the axis of a plant embryo or seedling : 1a: the root portion 1b: HYPOCOTYL 1c: the hypocotyl and the root together 2: the rootlike beginning of an anatomical vessel or part 3: RADICAL - ra.dic.u.lar aj