Synonyms: Archaeozoic, Archaeozoic aeon, Archean, Archean aeon, Archean eon, Archeozoic, Archeozoic eon
Definition: the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
Synonyms: archaeozoic, archeozoic
Definition: of or belonging to earlier of two divisions of the Precambrian era
Usage: archeozoic life forms
Similar words: early
Definition: at or near the beginning of a period of time or course of events or before the usual or expected time
Usage: early morning; an early warning; early diagnosis; an early death; took early retirement; an early spring; early varieties of peas and tomatoes mature before most standard varieties