Толковый словарь английского языка Oxford English Reference - quaternary
Quaternary
quaternary
adj. & n. --adj. 1 having four parts. 2 (Quaternary) Geol. of or relating to the most recent period in the Cenozoic era with evidence of many species of present-day plants and animals (cf. PLEISTOCENE, HOLOCENE). Usage Cf. Appendix II. --n. (pl. -ies) 1 a set of four things. 2 (Quaternary) Geol. the Quaternary period or system. Etymology: ME f. L quaternarius f. quaterni distrib. of quattuor four
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I. adjective Etymology: Latin quaternarius, from quaterni four each Date: 1605 1. of, relating to, or consisting of four units or members, of, relating to, or being a number system with a base of four, of, relating to, or being the geological period from the end of the Tertiary to the present time or the corresponding system of rocks, consisting of, containing, or being an atom bonded to four other atoms, II. noun (plural -ries) Date: 1880 the Quaternary period or system of rocks, a member of a group fourth in order or rank ...Толковый словарь английского языка
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