prognathous Meaning, Definition & Usage

  1. adjective having a projecting lower jaw
    prognathic; hypognathous.

WordNet

Prog"na*thous adjective
Etymology
Gr. before + the jaw
Definitions
  1. (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. Kane.

Webster 1913