noun
- 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: Archean, Archean eon, Archeozoic, Archaeozoic, Archeozoic eon, Archaeozoic aeon
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| APA | WordNet. (2010). archean aeon. Retrieved September 21, 2026, from http://smartdefine.org/archean_aeon/definitions/1257342 |
| Chicago | WordNet. 2010. "archean aeon" http://smartdefine.org/archean_aeon/definitions/1257342 (accessed September 21, 2026). |
| Harvard | WordNet 2010, archean aeon, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/archean_aeon/definitions/1257342>. |
| MLA | WordNet. "archean aeon" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/archean_aeon/definitions/1257342> |