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1. Liable to sudden unpredictable change
   "a quicksilver character, cool and wilful at one moment, utterly fragile the next";
   - erratic, fickle, mercurial

1. A heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures
   - mercury, hydrargyrum, Hg, atomic number 80

Derived forms: quicksilvers

See also: changeable, changeful

Type of: metal, metallic element

Part of: calomel, cinnabar, mercurous chloride

Encyclopedia: Quicksilver