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A Writer's Dictionary:

Archean Definition


Dictionary Home » Words Starting with A » archduke ... argumentative » Archean


Archaean
Archean
adj
    1. geol.
      Denoting the earlier of the two geological eons into which the Precambrian period is divided, extending from the time of formation of the Earth to about 2 500 million years ago.
Etymology: 19c: from Greek archaios ancient.



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