• Webster's Revised Unabridged Dictionary
    • a Schizognathous (Zoöl) 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.
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Century Dictionary and Cyclopedia
    • schizognathous In ornithology, having the bony palate cleft in such a way that in the dry skull “the blade of a thin knife can be passed without meeting with any bony obstacle from the posterior nares alongside the vomer to the end of the beak” (Huxley); exhibiting schizognathism in the structure of the bony palate: as, aschizognathous bird; a schizognathous palate; a schizognathous type of palatal Structure. The vomer, whether large or small, tapers to a point in front, while behind it embraces the basisphenoidal rostrum, between the palatines; these bones and the pterygoids are directly articulated with one another and with the basisphenoidal rostrum, not being borne upon the divergent posterior ends of the vomer; the maxillopalatines, usually elongated and lamellar, pass inward over the anterior ends of the palatines, with which they unite, and then bend backward, along the inner ends of the palatines, leaving a broader or narrower fissure between themselves and the vomer, on each side, and do not unite with one another or with the vomer.
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Chambers's Twentieth Century Dictionary
    • adj Schizognathous skī-zog′nā-thus having the maxillo-palatine bones separate from each other and from the vomer, as in the gulls, plovers, &c
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Webster's Revised Unabridged Dictionary
Schizo-, + Gr. the jaw
Chambers's Twentieth Century Dictionary
Gr. schizein, to cleave, gnathos, the jaw.


In literature:

The schizognathous formation is doubtless the most primitive, and its representatives form a tolerably natural assembly.
"Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7" by Various