orthognathismn.
/ɔːˈθɒɡnəθɪz(ə)m/, U.S. /ɔrˈθɑɡnəˌθɪz(ə)m/ Physical Anthropology.
The condition of being orthognathous.
ΘΚΠ
the world > life > the body > external parts of body > head > face > jaws > [noun] > conditions or positions of
underhanging1842
prognathism1860
orthognathism1862
rest position1865
mesognathy1884
eurygnathism1890
prognathy1890
mesognathism1891
underhang1903
underbite1976
1862 T. H. Huxley in Notices Proc. Royal Inst. Great Brit. 3 420 Neither orthognathism nor prognathism are necessarily correlated with brachycephaly or dolichocephaly.
1871 W. B. Dawkins Cave Hunting vi. 201 They are remarkable for..the delicacy of their features, and the orthognathism of their faces.
1896 A. H. Keane Ethnol. 181 Prognathism is naturally regarded as characteristic of the lower, orthognathism of the higher races.
1924 Jrnl. Royal Anthropol. Inst. 54 177 The alveolar prognathism, so noticeable in many of the individual brachycephalic contours, does not appear in the composite drawing, having, no doubt, been counterbalanced by the orthognathism of the rest.
1947 Evolution 1 229/1 The facial ‘prognathism’ becomes further reduced to ‘orthognathism’ and ‘hyper-orthognathism,’ and the cheeks appear correspondingly more ‘sunken.’
1969 Current Anthropol. 10 483/2 The facial skeleton displays marked orthognathism and the presence of a hollowed-out transition of the maxilla in the lower region of the cheekbone, a maxillary incisure.
1994 Proc. National Acad. Sci. U.S.A. 91 6780/2 This ancestor would have the degree of basicranial flexion and orthognathism seen in early Homo.
This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022).
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n.1862