| 释义 |
Adjective: archaean- Of or relating to the earliest known rocks formed during the Precambrian Eon
- archean [US]
Noun: Archaean- The time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
- Archean [US], Archean eon, Archean aeon, Archeozoic, Archaeozoic, Archeozoic eon, Archaeozoic aeon
See also: early Type of: aeon, eon Part of: Precambrian, Precambrian aeon, Precambrian eon, Precambrian period Encyclopedia: Archaean |