Archean
/ɑ:'ki:әn/
📖 中文释义
- n. 太古代
- a. 太古代的
🔗 释义中的汉语词
📘 English Definition（英文释义）
- n. the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
- s. of or relating to the earliest known rocks formed during the Precambrian Eon