Prognathous adj. (Anat.) Having the jaws projecting beyond the upper part of the face; opposed to orthognathous. See Gnathic index, under Gnathic. "Their countenances had the true prognathous character."
... oily-like. No boats, no boats—an' I can't see anybody aboard." Suddenly Kitchell lowered the glass and turned to Wilbur. He was a different man. There was a new shine in his eyes, a wicked line appeared over the nose, the jaw grew salient, prognathous. ... — Moran of the Lady Letty • Frank Norris