Meaning of “mercurial” in the English Dictionary

"mercurial" in British English

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mercurialadjective

uk /mɜːˈkjʊə.ri.əl/ us /mɝːˈkjʊr.i.əl/

mercurial adjective (RELATING TO MERCURY)

specialized medical containing or caused by mercury:

mercurial drugs

(Definition of “mercurial” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)