Definitions
1.nounAny of the plants known as mercury, especially the annual mercury or French mercury (Mercurialis annua).
2.nounA person born under the influence of the planet Mercury; hence, a person having an animated, lively, quick-witted or volatile character.
3.nounA chemical compound containing mercury.
4.nounA preparation of mercury, especially as a treatment for syphilis.
5.adjectiveHaving a lively or volatile character; animated, changeable, quick-witted."his mercurial temperament"
6.adjectivePertaining to the astrological influence of the planet Mercury; having the characteristics of a person under such influence (see adjective sense 1).
7.adjectivePertaining to the planet Mercury.
8.adjectiveOf or pertaining to the element mercury or quicksilver; containing mercury.
9.adjectiveCaused by the action of mercury or a mercury compound.
10.adjectivePertaining to Mercury, the Roman god of, among other things, commerce, financial gain, communication, and thieves and trickery; hence , money-making; crafty.