GNU Collaborative International Dictionary of English

Found one definition

1.       
   ‖Cyclostomata (s?ˌkl?-st?mˈ?-t?), ‖Cyclostoma (s?-kl?sˈt?-m?), n. pl. [NL., fr. Gr. κύκλος circle + στόμα, -ατος mouth.] (Zool.) A division of Bryozoa, in which the cells have circular apertures.
   
   [1913 Webster]