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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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  2. dictionary.cambridge.org › dictionary › englishMERCURIAL | English meaning - Cambridge Dictionary

    Mercurial means changing suddenly and often, or intelligent and quick. It can also refer to something containing or caused by mercury. Learn more about the word, its synonyms, antonyms, and usage with examples.

  3. www.merriam-webster.com › dictionary › mercurialMercurial Definition & Meaning - Merriam-Webster

    Mercurial can mean of, relating to, or born under the planet Mercury, or having qualities of eloquence, ingenuity, or thievishness attributed to the god Mercury. It can also mean characterized by rapid and unpredictable changeableness of mood, or of, relating to, containing, or caused by mercury.

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  5. dictionary.cambridge.org › us › dictionaryMERCURIAL | definition in the Cambridge English Dictionary

    Mercurial means changing suddenly and often, or intelligent and enthusiastic. It can also refer to something containing or caused by mercury. Learn more about this word, its usage and related terms.

  6. www.dictionary.com › browse › mercurialMERCURIAL Definition & Meaning | Dictionary.com

    Mercurial definition: changeable; volatile; fickle; flighty; erratic. See examples of MERCURIAL used in a sentence.

  7. www.collinsdictionary.com › dictionary › englishMERCURIAL definition and meaning | Collins English Dictionary

    Mercurial means changeable, volatile, or quick-witted, often influenced by the god or planet Mercury. Learn more about the word origin, synonyms, antonyms, and examples of mercurial in sentences.

  8. www.vocabulary.com › dictionary › mercurialMercurial - Definition, Meaning & Synonyms | Vocabulary.com

    Mercurial describes someone whose mood or behavior is changeable and unpredictable, or someone who is clever, lively, and quick. With a mercurial teacher, you never know where you stand.

  9. www.oxfordlearnersdictionaries.com › english › mercurialmercurial adjective - Definition, pictures, pronunciation and...

    Mercurial means often changing or reacting in a way that is unexpected, or lively and quick. It can also mean containing mercury. Learn more about this word, its pronunciation, usage and synonyms with OxfordLearnersDictionaries.com.