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    quaternary - Dictionary definition and meaning for word quaternary

    (noun) last 2 million years Definition
    (noun) the cardinal number that is the sum of three and one Definition
    (adj) consisting of or especially arranged in sets of four
    Synonyms : quaternate
    Example Sentence
    • quaternate leaves
    • a quaternary compound
    (adj) coming next after the third and just before the fifth in position or time or degree or magnitude
    Synonyms : 4th , fourth
    Example Sentence
    • the quaternary period of geologic time extends from the end of the tertiary period to the present
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