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[awr-thog-nuh-thuh s] /ɔrˈθɒg nə θəs/
adjective, Craniometry.
straight-jawed; having the profile of the face vertical or nearly so; having a gnathic index below 98.
Also, orthognathic
[awr-thuh g-nath-ik, -thog-] /ˌɔr θəgˈnæθ ɪk, -θɒg-/ (Show IPA)
Origin of orthognathous
1850-55; ortho- + -gnathous
Related forms
[awr-thog-nuh-thiz-uh m] /ɔrˈθɒg nəˌθɪz əm/ (Show IPA),
orthognathy, noun
hyperorthognathous, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for orthognathous
Historical Examples
  • There is little or no brow prominence and one at least of the skulls is as orthognathous in facial angle as that of a European.

    Man, Past and Present Agustus Henry Keane
  • The "gnathic index" is said to show that Europeans and Bushmen are orthognathous.

  • I do not see that an orthognathous face would cost more than a prognathous face; or a good morale than a bad one.

  • At its northeastern end is the most round-headed, orthognathous, straight-haired, and yellow-skinned race.

    Man And His Ancestor Charles Morris
British Dictionary definitions for orthognathous


(anatomy) having normally aligned jaws
Derived Forms
orthognathism, orthognathy, noun
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
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