单词 | triangulo- |
释义 | triangulo-comb. form used as combining form of Latin triangulum triangle n., in triangulo-pyramidal adj., triangulo-triangular adj. applied to certain series of figurate numbers: see quots., and cf. pyramidal adj. 4, triangular adj. 2b. ΚΠ 1715 Philos. Trans. 1714–16 (Royal Soc.) 29 183 A series of Fractions..whose Numerator is a given Number and Denominators are triangular or pyramidal or triangulo-triangular Numbers, &c. 1785 C. Hutton Math. Tables 7 The several orders of figurate numbers, which he [Vieta] calls triangular, pyramidal, triangulo-triangular, triangulo-pyramidal. This entry has not yet been fully updated (first published 1914; most recently modified version published online March 2022). < comb. form1715 |
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