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 (prŏg′nə-thəs, prŏg-nā′-) also prog·nath·ic (prŏg-năth′ĭk, -nā′thĭk)
Having jaws or mouthparts that project forward to a marked degree.

prog′na·thism (-nə-thĭz′əm) n.


(prɒɡˈneɪθəs) or


(Anatomy) having a projecting lower jaw
[C19: from pro-2 + Greek gnathos jaw]
prognathism n


(ˈprɒg nə θəs, prɒgˈneɪ-)

also prog•nath•ic

(prɒgˈnæθ ɪk)

having protrusive jaws.
[1830–40; pro-2 + -gnathous]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.prognathous - having a projecting lower jaw
opisthognathous - having receding jaws


a. prognato-a, que tiene la mandíbula prominente.
References in classic literature ?
The next most obvious deformity was in their faces, almost all of which were prognathous, malformed about the ears, with large and protuberant noses, very furry or very bristly hair, and often strangely-coloured or strangely-placed eyes.
A huge brute with thick lips and prognathous jaw stood at her shoulder.
In order to discover the necessary area, Nature had given him an enormous prognathous jaw.
This malignant and terrible contortion, combined with the low forehead, blunt nose, and prognathous jaw gave the dead man a singularly simious and ape-like appearance, which was increased by his writhing, unnatural posture.
Particularly useful is the fact its prognathous recoil-spring guide rod gives the XD-E standoff capability, which means if the muzzle is pressed hard against a firm surface when the trigger is pulled, it won't go out of battery and fail to fire, as most autos are wont to do in such situations.
I should venture to say that there is a prognathous beetling-browed, short-legged, long-armed 'ape like'--type of Negro dwelling in pariah tribes or cropping up as reversionary individuals in a better-looking people, to be met with all down Central Africa.
More often than not the popular images of the Irish as violent and backward people, produced and consumed extensively by both a British and later a Nativist American audience, depicted "Paddy as a half-simian peasant with sloping forehead, snub nose, and prognathous or projecting lower jaw akin to the facial features of an ape.
2 and 4) prognathous, depressed; dorsal epicranial ridge irregular, semicircular, from frontal arms to near base, very coarsely and irregularly punctate and setose internally (setae not represented); ventral epicranial ridge almost straight, not reaching margins, with row of coarse setose punctures externally; each epicranial plate dorsally with one lateral inclined row of setae, starting in front of stemma and directed outside, and another ventrally parallel lateral margin.
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.
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).