Prognathism is a descriptive term for a jaw (lower or upper) that protrudes forward beyond the plane of the face.
Update Date 2/2/2012
Updated by: John Goldenring, MD, MPH, JD, Pediatrics, Sharp Rees-Stealy Medical Group, San Diego, CA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.