{ ||Chi*los"to*ma (?), Chi*lo*stom"a*ta (?), } n. pl. [NL., fr. Gr. &?; + &?;, &?;, outh.] (Zoöl.) 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.]