cretaceous

/kri'teiʃәs/

BNC频率: 18039

现代语料频率: 25007

a. 白垩系的, 白垩纪的

n. 白垩纪, 白垩系

n. from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants

a. abounding in chalk

a. of or relating to or denoting the third period of the Mesozoic era

primitive reptile-like fossil birds of the Jurassic or early Cretaceous

A cephalopod of the extinct genus Baculites, found fossil in the Cretaceous rocks

fish thought to have been extinct since the Cretaceous period but found in 1938 off the coast of Africa

of the Cretaceous

An extinct, long-necked, marine, cretaceous reptile from Kansas, allied to Plesiosaurus.

今日更新

更新时间：2025-06-21 13:07:58