Having the qualities fabled to belong to the god Mercury; swift; active; sprightly; fickle; volatile; changeable; as, a mercurial youth; a mercurial temperament.
liable to sudden unpredictable change; "erratic behavior"; "fickle weather"; "mercurial twists of temperament"; "a quicksilver character, cool and willful at one moment, utterly fragile the next"
relating to or having characteristics (eloquence, shrewdness, swiftness, thievishness) attributed to the god Mercury; "more than Mercurial thievishness"
Refers to a primer composition containing a mercury compound. Non-mercurial primers are desired because traces of mercury in a fired cartridge case make it brittle and less useful for reloading.
One of the seven primary body types. Its positive pole is agile, its negative pole is frenetic. Mercurial types tend to have dark hair and eyes, and compact bodies. They tend to be energetic and good communicators.