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  1. Dictionary
    mercurial
    /məːˈkjʊərɪəl/

    adjective

    • 1. subject to sudden or unpredictable changes of mood or mind: "his mercurial temperament"
    • 2. of or containing the element mercury: "gels containing organic mercurial compounds"

    noun

    • 1. a drug or other compound containing mercury: "for twenty years organic mercurials were the most potent diuretics in clinical use"

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