Word Study
gnathic
CIDE DICTIONARY
gnathic, a. [Gr. gna`qos the jaw.].
Of or pertaining to the jaw. [1913 Webster]
"Skulls with the gnathic index below 98 are orthognathous, from 98 to 103 mesognathous, and above 103 are prognathous." [1913 Webster]
For further exploring for "gnathic" in Webster Dictionary Online