orthognathous
正頜; 直口式的
or·thog·na·thous /-nəθəs/ 形容詞
直頜的
Or·thog·na·thous a. 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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