Meaning of cyclostomatous

cy•clo•stom•a•tous

Pronunciation: (sī"klu-stom'u-tus, -stō'mu-, sik"lu-), [key]
— adj.
  1. having a circular mouth.
  2. belonging or pertaining to the cyclostomes.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.