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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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(prɒɡˈneɪθəs) or


(Anatomy) having a projecting lower jaw
[C19: from pro-2 + Greek gnathos jaw]
prognathism n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈprɒg nə θəs, prɒgˈneɪ-)

also prog•nath•ic

(prɒgˈnæθ ɪk)

having protrusive jaws.
[1830–40; pro-2 + -gnathous]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.prognathous - having a projecting lower jaw
opisthognathous - having receding jaws
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


a. prognato-a, que tiene la mandíbula prominente.
English-Spanish Medical Dictionary © Farlex 2012
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.
A facial diagram (polygon) consisting of linear and angular configurations determining the extent of facial prognathous, makes up the Bjork Jarabak's Analysis.4
Kipling describes the men as standing "in hierarchical order," and, exulting in his personal hoard of English words, he draws vocabulary items from a time earlier than his own Victorian period to speak of "feudal and prognathous Villeins" and "adscript serfs, holding the reversion of a scraped marrow-bone." With a happy question, "Aren't these beautiful words?" he even refers to "heriot," a word presumably acquired from fairly close study of the literature of his heroic, but long dead, Anglo-Saxon ancestors (135).
Candace 2/ A Profile She was Sheba; dred-locked, prognathous, pristine, lovely, this unique, spring morning, filling these moments with sunlight.
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.
Other characters helpful for recognition include: small body size (1 - 6 mm long from clypeus to elytral apex); body generally elongate-cylindrical to elongate-flattened, subglabrous to setaceous; head prognathous, exposed from above; antennae usually not concealed from above, widely separated, usually with an abrupt 1 - 2 segmented antennal club (not abrupt in Crowsonius Pakaluk & Slipinski and some Leptipsius Casey), never 3 segmented; pronotum variable; mesocoxal cavities open; elytra with strong puncture rows or with dense, confused punctation; abdominal ventrite 1 usually as long as 2 - 4 combined; and pygidium well-sclerotized, punctured (Bousquet 2009, McElrath et al.
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." The result, according to Curtis, of this racial construction helped exacerbate the tragedy of the Great Hunger by offering a psychic shield for those in power to justify a policy of removal, of cutting relief, and even celebration at the death of Ireland's poor at the very height of the Famine.
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.