Usually means: Ancient geological era, early life.
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We found 7 dictionaries that define the word archean aeon:

General (6 matching dictionaries)
  1. Archean aeon: Vocabulary.com
  2. archean aeon: Dictionary.com
  3. Archean aeon: Rhymezone
  4. archean aeon: FreeDictionary.org
  5. archean aeon: Mnemonic Dictionary
  6. Archean aeon: TheFreeDictionary.com

Computing (1 matching dictionary)
  1. Archean aeon: Encyclopedia

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Definitions from WordNet (Archean aeon)

▸ 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


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