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trias|ˈtraɪæs|
[a. late L. trias, a. Gr. τριάς the number three: see triad. In 2, a. Ger. Trias.]
1. The number three; a set of three, a triad.
1610Bolton Elem. Armories 182 One is onely best: next to that the Trias, Ternio, or number three, and so the rest of the Odde to Fifteen. 1635Heywood Hierarch. ii. 68 Sometimes, what's proper vnto Man alone, Is giuen to this Trias, three in One: As, when we attribute vnto him Wings. 1728H. Herbert tr. Fleury's Eccl. Hist. I. 250 This is the first time that we meet in the ancients with the word Trias, or Trinity in this sense. 1864Daily Tel. 9 Sept., A people with whom drinking, smoking, and spitting are the Trias of social bliss.
2. Geol. (Usu. with capital initial.) Name for the series of strata lying immediately beneath the Jurassic and above the Permian; so called because divisible, where typically developed (as in Germany), into three groups (Keuper, Muschelkalk, and Bunter Sandstein); represented in Britain by the Upper New Red Sandstone and associated formations.
1841Murchison, etc. in Proc. Geol. Soc. Lond. (1842) III. 403 The Trias of German geologists. 1842Sedgwick in Hudson's Guide Lakes (1843) 204 In France and Germany the series of rocks..admits of a triple division (called ‘Trias’, or the ‘Triassic system’). 1876Page Adv. Text-Bk. Geol. xvi. 289 The reason for regarding the Trias as mesozoic. 1912Return Brit. Museum 169 A slab of Rhynchocephalian and other footprints from the Trias of Storeton, Cheshire.
attrib. and Comb.1855J. Phillips Man. Geol. 248 Bands of red and blue trias-like sandstones and clays. 1867W. W. Smyth Coal & Coal-mining 240 Reaching coal beneath the Permian and Trias formations. |