Term: prognathus or prognathism
Literally meaning: “jaw forward”
Origin: Anc Greek
προ-/pro-(= suffix denoting “toward”, “in front of”, “precede”, “before”)
+ γνάθος/gnathos(=jaw, maxilla)
Jaw protrusion as a critical physical characteristic was coined by English anthropologist by Sir Edward Evans-Pritchard (1902 – 1973). In contrast, jaw retraction was named “orthognathism”.
(Sourse: RACE AND AESTHETICS IN THE ANTHROPOLOGY OF PETRUS CAMPER (1722-1789), Editions Rodopi bv, Amsterdam-Atlanta, GA 1999).
Prognathous is the condition which is associated with a projecting jaw. Prognathism is considered a malformation only if it affects speech or mastication.