obtriangularadj.

Brit.

/ɒbtrʌɪˈaŋɡjᵿlə/, U.S.

/ɑbˌtraɪˈæŋɡjələr/

Origin: Formed within English, by derivation. Etymons: ob- prefix, triangular adj.

Etymology: < ob- prefix + triangular adj. Compare slightly earlier obtrigonate adj., and later obtrigonal adj.

Botany and Zoology.

Triangular in form, with the apex downwards or at the base.

ΘΚΠ

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

triquetral1646

trigonala1728

triquetrous1752

trigonate1815

obtrigonate1819

trigonous1821

trigonoidal1822

obtriangular1826

obtrigonal1856

1826 W. Kirby & W. Spence Introd. Entomol. III. xxxii. 324 The fourth joint is very large and obtriangular.

1936 Ann. Missouri Bot. Garden 23 362 Epistamenal appendages replaced by rather inconspicuous, callous, obtriangular, foveolate protuberances 0.1–0.12 cm. long.

1952 Amer. Midland Naturalist 48 343 Elytra entirely pale; pronotum with an obtriangular fuscous macula at middle..[Pseudozonitis] vogti.

1986 Brittonia 38 195 Petal creamy white, the lamina ovate-oblong in outline, concave at upper middle, rounded at apex,..the claw obtriangular or rectangular, subcordate at base, 1–1.2mm long.

This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).

单词	obtriangular
释义	obtriangularadj. Brit. /ɒbtrʌɪˈaŋɡjᵿlə/, U.S. /ɑbˌtraɪˈæŋɡjələr/ Origin: Formed within English, by derivation. Etymons: ob- prefix, triangular adj. Etymology: < ob- prefix + triangular adj. Compare slightly earlier obtrigonate adj., and later obtrigonal adj. Botany and Zoology. Triangular in form, with the apex downwards or at the base. ΘΚΠ the world > life > biology > physical aspects or shapes > shape > [adjective] > triangular or three-sided triquetral1646 trigonala1728 triquetrous1752 trigonate1815 obtrigonate1819 trigonous1821 trigonoidal1822 obtriangular1826 obtrigonal1856 1826 W. Kirby & W. Spence Introd. Entomol. III. xxxii. 324 The fourth joint is very large and obtriangular. 1936 Ann. Missouri Bot. Garden 23 362 Epistamenal appendages replaced by rather inconspicuous, callous, obtriangular, foveolate protuberances 0.1–0.12 cm. long. 1952 Amer. Midland Naturalist 48 343 Elytra entirely pale; pronotum with an obtriangular fuscous macula at middle..[Pseudozonitis] vogti. 1986 Brittonia 38 195 Petal creamy white, the lamina ovate-oblong in outline, concave at upper middle, rounded at apex,..the claw obtriangular or rectangular, subcordate at base, 1–1.2mm long. This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022). < adj.1826
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