Archean, n.
the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
<noun.time>
Archaeozoic Archaeozoic aeon Archean Archean aeon Archean eon Archeozoic Archeozoic eon
lexical pointers
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lexical pointers
derivationally related form
lexical pointers
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