prognathous

adjective

prog·​na·​thous ˈpräg-nə-thəs 

: 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.

—Richard Conniff

a prognathous fish

Examples of prognathous in a Sentence

Recent Examples on the Web

The front of his face — his nose, maxilla, sinuses, jaw — projected forward like a canine skull — what an anthropologist would call prognathous. —Dwight Garner, New York Times, 23 Aug. 2021

The whole universe is under attack from Thanos, an infinitely villainous villain sporting a multicleft, prognathous chin. —Joe Morgenstern, WSJ, 25 Apr. 2018

Word History

First Known Use

1836, in the meaning defined above

Medical Definition

prognathous

adjective

prog·​na·​thous ˈpräg-nə-thəs 

: being or having a jaw and typically a lower jaw that projects forward especially to an unusual degree