Archaeozoic aeon
Also found in: Thesaurus.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Switch to new thesaurus
Noun | 1. | Archaeozoic aeon - the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life Precambrian, Precambrian aeon, Precambrian eon, Precambrian period - the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago |
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.