n. [ L. verticillus, dim. of vertex a whirl: cf. F. verticille. See Vertex. ] (Bot.) A circle either of leaves or flowers about a stem at the same node; a whorl.
a. [ NL., fr. L. verticillus a whirl + aster a star. ] (Bot.) A whorl of flowers apparently of one cluster, but composed of two opposite axillary cymes, as in mint. See Illust. of Whorl. [ 1913 Webster ]
‖n. [ L., a whirl. ] (Bot.) A whorl; a verticil. [ 1913 Webster ]