prog·na·thous 
(prŏgnə-thəs, prŏg-nā-) also prog·nath·ic (prŏg-năthĭk, -nāthĭk)
(prŏgnə-thəs, prŏg-nā-) also prog·nath·ic (prŏg-năthĭk, -nāthĭk)adj.
Having jaws or mouthparts that project forward to a marked degree.
progna·thism (-nə-thĭz′əm) n.