adj.白垩的，白垩纪的
n.白垩纪，白垩系

Cretaceous白垩纪的
词源同crayon, 石灰，粉笔。

the Cretaceous period → 白垩纪；白垩纪时期
Cretaceous Period → 白垩纪；生活在白垩纪时期
Cretaceous Research → 白垩纪研究
Early Cretaceous → 早白垩纪
Lower Cretaceous → 白垩纪早期
Late Cretaceous → 晚白垩世
cretaceous transgression → 白垩纪海进
Upper Cretaceous → 白垩纪晚期；上白垩统

1. Only in the tropics were numerous late Cretaceous groups extinguished during peaks in their evolution.
[汉]只是热带地区才有大批晚白垩纪生物类群正值其演化的极盛时期突然消亡.
——来自辞典例句
2. The Cretaceous extinction was like a terrible streak of bad luck lasting millions of years.
[汉]白垩纪的生物绝灭,犹如一场持续千百万年的可怕厄运.
——来自辞典例句
3. Liupanshan Cretaceous basin is a mono - basin of Liupanshan inland overlapping basin.
[汉]六盘山白垩纪盆地是六盘山内陆叠合盆地的一个单型盆地.
——来自互联网
4. The story takes place 6500 years ago in the Cretaceous period.
[汉]故事发生在6500万年前的白垩纪晚期.
——来自互联网
5. So the researchers resorted to some techniques out of a Cretaceous CSI.
[汉]所以科学家只能借助于《犯罪现场调查:白垩纪篇》用到的技术.
——来自互联网

【Adjective】

1. abounding in chalk
2. of or relating to the Cretaceous geologic era;
"cretaceous rocks"