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  • word of the day

    proterozoic

    proterozoic - 365bet中国官方网站 definition and meaning for word proterozoic

    Definition
    (noun) from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms Definition
    (adj) formed in the later of two divisions of the Precambrian era
    Example Sentence
    • proterozoic life forms
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