| 单词 | cretaceous |
| 释义 | cretaceous adj. & n. --adj 1. of the nature of chalk. 2. (Cretaceous) Geol. of or relating to the last period of the Mesozoic era, with evidence of the first flowering plants, the extinction of dinosaurs, and extensive deposits of chalk. Usage Cf. Appendix II. --n Geol. this era or system. Etymology: L cretaceus f. creta chalk |
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