Gnathostomata
(redirected from Gnasthostomata)Also found in: Dictionary, Thesaurus, Encyclopedia.
Gnathostomata
the vertebrates that possess true jaws, i.e. all true fish (not lampreys and hagfish), amphibia, reptiles, birds and mammals.Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005