Source : Webster's Revised Unabridged Dictionary (1913)

Ctenostomata \Cten`o*stom"a*ta\ (t?n`?-st?m"?-t?), n. pl. [NL.,
   fr. Gr. ???, ???, comb + ????, -??? mouth.] (Zo["o]l.)
   A suborder of Bryozoa, usually having a circle of bristles
   below the tentacles.