flagellum

‖n.; pl. E. Flagellums L. Flagella [ L., a whip. See Flagellate, v. t. ] 1. (Bot.) A young, flexible shoot of a plant; esp., the long trailing branch of a vine, or a slender branch in certain mosses. [ 1913 Webster ]

2. (Zool.) (a) A long, whiplike cilium. See Flagellata. (b) An appendage of the reproductive apparatus of the snail. (c) A lashlike appendage of a crustacean, esp. the terminal ortion of the antennæ and the epipodite of the maxilipeds. See Maxilliped. [ 1913 Webster ]