The Collaborative International Dictionary of English v.0.48:

Pharyngognathi \Phar`yn*gog"na*thi\, n. pl. [NL. See Pharynx,
   and Gnathic.] (Zool.)
   A division of fishes in which the lower pharyngeal bones are
   united. It includes the scaroid, labroid, and embioticoid
   fishes.
   [1913 Webster]