'Cyclostomi' definitions:

Definition of 'Cyclostomi'

From: GCIDE

Cyclostomi \Cy*clos"to*mi\ (s?-kl?s"t?-m?), n. pl. [NL. See Cyclostomata.] (Zool.) A glass of fishes having a suckerlike mouth, without jaws, as the lamprey; the Marsipobranchii. [1913 Webster]