What does "flagellum" mean?

Flagellum: (Zoöl.) (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.

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