1. any of the flagellated cells in sponges having a collar of cytoplasm around the flagellum; they maintain a flow of water through the body; [syn: choanocyte, collar cell]
WordNet (r) 3.0 (2006):
collar cell
n 1: any of the flagellated cells in sponges having a collar of
cytoplasm around the flagellum; they maintain a flow of
water through the body [syn: choanocyte, collar cell]