The Collaborative International Dictionary
Mesognathous
Mesognathous \Me*sog"na*thous\, a. [Meso- + Gr. gna`qos jaw.] (Anat.) Having the jaws slightly projecting; between prognathous and orthognathous. See Gnathic index, under Gnathic.
Wiktionary
mesognathous
a. (context anatomy English) having the jaws slightly projecting; between prognathous and orthognathous