Entry 1 sense Webster, 1913 Ctenostomata /(t?n`?-st?m"?-t?)/ · Cten·o·stom·a·ta · IPA 01 n. pl. A suborder of Bryozoa, usually having a circle of bristles below the tentacles. 1. A suborder of Bryozoa, usually having a circle of bristles below the tentacles.(Zool.)