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单词 trias
释义

triasn.

Brit. /ˈtrʌɪas/, U.S. /ˈtraɪəs/
Etymology: < late Latin trias, < Greek τριάς the number three: see triad n. In sense 2, < German Trias.
1. The number three; a set of three, a triad.
ΘΚΠ
the world > relative properties > number > specific numbers > three > [noun]
threec1175
trias1610
triad1660
the world > relative properties > number > specific numbers > three > group of three > [noun]
leashc1330
ternarya1464
trinity1542
three?1544
triad1546
trine1554
triplicity1585
ternion1587
pair royal1592
trinary1596
trias1610
gleek1615
triangle1621
triple1653
triumvirate1655
prial1776
trio1777
trefoil1826
trinomy1838
Pip, Squeak, and Wilfred1937
1610 E. Bolton Elements of Armories 182 One is onely best: next to that the Trias, Ternio, or number three, and so the rest of the Odde to Fifteen.
1635 T. Heywood Hierarchie Blessed Angells ii. 68 Sometimes, what's proper vnto Man alone, Is giuen to this Trias, three in One: As, when we attribute vnto him Wings.
1727 H. Herbert tr. C. Fleury Eccl. Hist. I. 250 This is the first time that we meet in the ancients with the word Trias, or Trinity in this sense.
1864 Daily Tel. 9 Sept. A people with whom drinking, smoking, and spitting are the Trias of social bliss.
2. Geology. (Usually 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.
ΘΚΠ
the world > the earth > structure of the earth > age or period > stratigraphic units > [noun] > secondary or Mesozoic > Triassic
trias1841
1841 R. I. Murchison et al. in Proc. Geol. Soc. (1842) 3 403 The Trias of German geologists.
1842 A. Sedgwick 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’).
1876 D. Page Adv. Text-bk. Geol. (ed. 6) xvi. 289 The reason for regarding the Trias as mesozoic.
1912 Return Brit. Museum 169 A slab of Rhynchocephalian and other footprints from the Trias of Storeton, Cheshire.

Compounds

attributive and in other combinations (in sense 2).
ΚΠ
1855 J. Phillips Man. Geol. 248 Bands of red and blue trias-like sandstones and clays.
1867 W. W. Smyth Treat. Coal & Coal-mining 240 Reaching coal beneath the Permian and Trias formations.
This entry has not yet been fully updated (first published 1914; most recently modified version published online March 2022).
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