[prog-nuh-thuh s, prog-ney-]

adjective Craniometry.

having protrusive jaws; having a gnathic index over 103.

Also prog·nath·ic [prog-nath-ik] /prɒgˈnæθ ɪk/.

Origin of prognathous

First recorded in 1830–40; pro-2 + -gnathous
Related formsprog·na·thism [prog-nuh-thiz-uh m] /ˈprɒg nəˌθɪz əm/, prog·na·thy, nounhy·per·prog·na·thous, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for prognathism

Historical Examples of prognathism

British Dictionary definitions for prognathism


prognathic (prɒɡˈnæθɪk)


having a projecting lower jaw
Derived Formsprognathism (ˈprɒɡnəˌθɪzəm), noun

Word Origin for prognathous

C19: from pro- ² + Greek gnathos jaw
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for prognathism



1836, from pro- + Greek gnathos "jaw" (see gnathic) + -ous. Related: Prognathic.

Online Etymology Dictionary, © 2010 Douglas Harper

prognathism in Medicine


[prŏgnə-thəs, prŏg-nā-]


Having jaws that project forward to a marked degree.
Related formsprogna•thism (-nə-thĭz′əm) n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.