Definition of orthognathous in English:

orthognathous

adjective

Anatomy
  • (especially of a person) having a jaw that does not project or recede, so that the facial profile is nearly vertical.

Origin

Mid 19th century: from ortho- straight + Greek gnathos jaw + -ous.

Pronunciation:

orthognathous

/ôrˈTHäɡnəTHəs/