| 释义 |
cretaceous/kriˈteiʃəs/ adj. & n.●adj. 1 of the nature of chalk 含白垩的，白垩构成的 2 (作 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 【地质】白垩纪的；白垩系的(中生代的最后阶段，以开花植物的出现、恐龙的绝灭和白垩的大量沉积为特点) ●n. (作 Cretaceous) Geol. this era or system 【地质】白垩纪；白垩系 [Latin cretaceus from creta ‘chalk’] |