Scrabble Dictionary

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Mercurial

məːˈkjʊəriəl

Mercurial definitions

adjective

Inflections:

mercurial

subject to sudden or unpredictable changes of mood or mind

"his mercurial temperament"

Synonyms:
volatile capricious temperamental excitable fickle changeable unpredictable variable protean mutable erratic quicksilver inconstant inconsistent unstable unsteady fluctuating ever-changing kaleidoscopic fluid wavering vacillating moody flighty wayward whimsical giddy impulsive
of or containing the element mercury

"gels containing organic mercurial compounds"
of the planet Mercury

noun

Inflections:

mercurial mercurials

a drug or other compound containing mercury

"for twenty years organic mercurials were the most potent diuretics in clinical use"