Hypertext Webster Gateway: "orthognathous"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Orthognathous \Or*thog"na*thous\, a. [Ortho- + Gr. ? the jaw.]
(Anat.)
Having the front of the head, or the skull, nearly
perpendicular, not retreating backwards above the jaws; --
opposed to {prognathous}. See {Gnathic index}, under
{Gnathic}.
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