The Collaborative International Dictionary of English v.0.48:

Schizognathous \Schi*zog"na*thous\, a. [Schizo- + Gr. ? the
   jaw.] (Zool.)
   Having the maxillo-palatine bones separate from each other
   and from the vomer, which is pointed in front, as in the
   gulls, snipes, grouse, and many other birds.
   [1913 Webster]