Gnathostoma
Pronunciation : Gna*thos"to*ma
Part of Speech : n.
Etymology : [NL., from Gr. (Zo?l.)
Definition : Defn: A comprehensive division of vertebrates, including all that have distinct jaws, in contrast with the leptocardians and marsipobranchs (Cyclostoma), which lack them. [Written also Gnathostomata.]
pl.
Source : Webster's Unabridged Dictionary, 1913