Mercurial

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Mercurial

(a.) Having the qualities fabled to belong to the god Mercury; swift; active; sprightly; fickle; volatile; changeable; as, a mercurial youth; a mercurial temperament.
(a.) Having the form or image of Mercury; -- applied to ancient guideposts.
(a.) Of or pertaining to Mercury as the god of trade; hence, money-making; crafty.
(a.) Of or pertaining to, or containing, mercury; as, mercurial preparations, barometer. See Mercury, 2.
(a.) Caused by the use of mercury; as, mercurial sore mouth.
(n.) A person having mercurial qualities.
(n.) A preparation containing mercury.