| Chilostomata | { ‖ } n. pl. [ NL., fr. Gr. &unr_; + &unr_;, &unr_;, outh. ] (Zool.) An extensive suborder of marine Bryozoa, mostly with calcareous shells. They have a movable lip and a lid to close the aperture of the cells. [ Also written Chillostomata. ] [ 1913 Webster ] Variants: Chilostoma |