What does Prognathous face mean?

: being or having a jaw and typically a lower jaw that projects forward especially to an unusual degree The umpire, a veteran of dim visage with a cigarette jutting out from his prognathous jaw, was diligent about sweeping the plate, but his strike zone tended to bounce.—

What is Orthognathous skull?

(I) Orthognathous face is a face with a straight jaw that means having the front of the head or the skull nearly perpendicular. In this form of face, the lower jaw is not projected outward, but both jaws are straight. The facial angle of the orthognathous skull is large.