= triquetrous, adj.
| 单词 | θ19751 | 
| 释义 | the world > life > biology > physical aspects or shapes > shape > 			[adjective]		 > triangular or three-sided (9)		 triquetral1646 = triquetrous, adj. trigonala1728 Triangular in section, triquetrous: now esp. in Zoology and Botany. triquetrous1752 Three-sided triangular; in Natural History of triangular cross-section, three-edged, trihedral, triangularly prismatic or pyramidal. trigonate1815 = trigonal, adj. 1 and 2. obtrigonate1819 = obtriangular, adj. trigonous1821 = trigonal, adj. 2. trigonoidal1822 (a) Natural History = A. adj.; (b) Geometry ‘like a trigonoid’ (Cent. Dict. 1891). obtriangular1826 Triangular in form, with the apex downwards or at the base. obtrigonal1856 = obtriangular, adj. | 
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