† obtrigonaladj.

Origin: Formed within English, by derivation; modelled on a Latin lexical item. Etymons: ob- prefix, trigonal adj.

Etymology: < ob- prefix + trigonal adj., after post-classical Latin obtrigonus (1849 in the source translated). Compare earlier obtrigonate adj. and obtriangular adj. N.E.D. (1902) gives the pronunciation as (ǫbtri·gŏnăl) /ɒbˈtrɪɡənəl/.

Entomology. Obsolete. rare.

= obtriangular adj.

ΘΚΠ

the world > life > biology > physical aspects or shapes > shape > [adjective] > triangular or three-sided

triquetral1646

trigonala1728

triquetrous1752

trigonate1815

obtrigonate1819

trigonous1821

trigonoidal1822

obtriangular1826

obtrigonal1856

1856–8 W. Clark tr. J. van der Hoeven Handbk. Zool. I. 323 Antennæ moderate, third joint..obtrigonal [L. obtrigono].

1856–8 W. Clark tr. J. van der Hoeven Handbk. Zool. I. 672 Shell oblong, oval or obtrigonal [L. obtrigona].

This entry has been updated (OED Third Edition, March 2004; most recently modified version published online June 2018).

单词	obtrigonal
释义	† obtrigonaladj. Origin: Formed within English, by derivation; modelled on a Latin lexical item. Etymons: ob- prefix, trigonal adj. Etymology: < ob- prefix + trigonal adj., after post-classical Latin obtrigonus (1849 in the source translated). Compare earlier obtrigonate adj. and obtriangular adj. N.E.D. (1902) gives the pronunciation as (ǫbtri·gŏnăl) /ɒbˈtrɪɡənəl/. Entomology. Obsolete. rare. = obtriangular adj. ΘΚΠ the world > life > biology > physical aspects or shapes > shape > [adjective] > triangular or three-sided triquetral1646 trigonala1728 triquetrous1752 trigonate1815 obtrigonate1819 trigonous1821 trigonoidal1822 obtriangular1826 obtrigonal1856 1856–8 W. Clark tr. J. van der Hoeven Handbk. Zool. I. 323 Antennæ moderate, third joint..obtrigonal [L. obtrigono]. 1856–8 W. Clark tr. J. van der Hoeven Handbk. Zool. I. 672 Shell oblong, oval or obtrigonal [L. obtrigona]. This entry has been updated (OED Third Edition, March 2004; most recently modified version published online June 2018). < adj.1856
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