Orthognathous adj. (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.
... Indo-European.—Hair long (accel.); jaws orthognathous (embryonic retard.); nose (generally) prominent with bridge (accel.); malar bones reduced (retard.); beard long (accel.); arms shorter (retard.); extensor muscles of the leg ... — Scientific American Supplement, No. 392, July 7, 1883 • Various
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