prognathous


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

prognathous

, prognathic
having a projecting lower jaw
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Pierolapithecus displays a low face with a posteriorly-situated glabella and a prognathous profile, coupled with a modern, great-ape-like facial configuration (Moya-Sola et al., 2004).
Mouth: Cichla kelberi has a protrusible and prognathous mouth, with the lower jaw being more prominent than the upper jaw.
Cranial characters include (1) wide nasal apertures (African), (2) narrow nasal apertures (Caucasoid), (3) wide interorbital distances (African), (4) no nasal sill (African), (5) pointed nasal spine (Caucasoid), (6) palate wide and often rectangular (African), (7) palate narrow and triangular (Caucasoid), (8) curved suture between the zygomatic and maxilla (Caucasoid), (9) edge-to-edge incisal occlusion (Asian), (10) slight overbite (Caucasoid), (11) anterior projecting zygomatics (Asian), (12) flattened facial skeleton (Asian), (13) prognathous facial skeleton (African), (14) circular orbits (Asian), (15) rectangular orbits (African) and (16) shovel-shaped incisors (Asian), (17) lighter and relatively smaller facial bones (Caucasoid), and (18) rounded calvaria (Asian).
The change from the almost classical prognathous cranium (20) of the first and second instars to a cranial orientation that is almost intermediate between prognathic and hypognathic conditions (subprognathic, 5) in the mature larva is notable.
This may be partly due to not using more characters of the male and female postabdomen and to an avoidance of other somatic characters where definition is difficult, for example, the relative head shape: prognathous versus opisthognathous, the degree of convergence of eye margins, and the subtle wing characters.
In short, the retention by Neanderthals of the primitive prognathous face typical of earlier hominids, in which the lower face is positioned in front of the brain, clearly indicates less efficient speech communication.
When the narrator is confronted by Healey, who is both pugnacious and "prognathous" (according to Webster's, characterized by "extension of the lower jaw," and one of Wolfe's wonderfully appropriate words), he responds with "apparent passivity" (3).
Heteroptera insects also have elongate, piercing mouthparts, which arise from either the ventral (hypognathous) or anterior (prognathous) part of the head.
Uya, the 'beetle-browed, prognathous, lank-armed' shaman-chief lusts after Eudena; but this maiden, 'our ancestor', prefers the more gracile, thoughtful Ugh-Lomi, who rescues her from Uya's violent courtship.
With his prognathous jaw, poor teeth and squinting right eye, Wilkes had un-heroic, not to say repulsive, physical characteristics which gave caricaturists such as Hogarth a ready-made object of ridicule.
Cross-eyed and with a prognathous jaw that would put Jay Leno to shame, Wilkes entered Parliament in 1757 at the age of 31.