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Gnathic, nath′ik, adj. of the jaws—also Gnā′thal.—ns.

Having been raised with a language that contains such combinations as "rhythm," "syzygy" and "gnathic," and in which gh, ph and ff can all sound alike, I don't see what the fuss is about.

I then believed, and have had no cause since to recede from it, that the vocal powers were correctly measured by the gnathic index; that the mind and voice were commensurate; and that as the cranio-facial angle widens the voice degrades in quality and scope.

Without speaking positively on this point, I certainly hold as strongly as ever that language makes the man, and that therefore for classificatory purposes also language is far more useful than colour of skin, hair, cranial or gnathic peculiarities.

The "gnathic index" is said to show that Europeans and Bushmen are orthognathous.