| 单词 | quaternary |
| 释义 | quaternary /kwot"euhr ner'ee, kweuh terr"neuh ree/, adj., n., pl. quaternaries. adj. 1. consisting of four. 2. arranged in fours. 3. (cap.) Geol. noting or pertaining to the present period of earth history, forming the latter part of the Cenozoic Era, originating about 2 million years ago and including the Recent and Pleistocene Epochs. See table under geologic time. 4. Metall. (of an alloy) having four principal constituents. n. 5. a group of four. 6. the number four. 7. (cap.) Geol. the Quaternary Period or System. [1400-50; late ME < L quaternarius consisting of four, equiv. to quatern(i) four at a time + -arius -ARY] |
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