archeozoic
adjective
1. of or belonging to earlier of two divisions of the Precambrian era
- archeozoic life forms
Similar word(s): early, archaeozoic
noun
1. the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
Similar word(s): archaeozoic, archean
Definition categories: time