Chilostoma \Chi*los"to*ma\, Chilostomata \Chi*lo*stom"a*ta\, n.
pl. [NL., fr. Gr. ? + ?, ?, 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]