• word of the day

    archean

    archean - Dictionary definition and meaning for word archean

    Definition
    (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 Definition
    (adj) of or relating to the earliest known rocks formed during the Precambrian Eon
    Synonyms : archaean
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