Cyclostomi
Pronunciation : Cy*clos"to*mi (s-kls"t-m)
Part of Speech : n.
Etymology : [NL. See Cyclostomata.] (Zo?l.)
Definition : Defn: A glass of fishes having a suckerlike mouth, without jaws, as the lamprey; the Marsipobranchii.
pl.
Source : Webster's Unabridged Dictionary, 1913