Archean (noun) Definition, Meaning & Examples

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noun
  1. the Precambrian eon that preceded the Proterozoic and during which the earliest datable rocks were formed and from which the oldest known fossil forms, including cyanobacteria, have been recovered.
adjective
  1. of or relating to this eon.
adjective
  1. a variant spelling (esp US) of Archaean
    Archean (noun) Definition, Meaning & Examples

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