mercurial

The definition of mercurial is changeable or fickle.

(adjective)

Someone who can get mad in the blink of an eye is an example of someone who would be described asmercurial.

See mercurial in Webster's New World College Dictionary

adjective

of Mercury (the god or planet)
of or containing mercury
caused by the action or use of mercury
having qualities attributed to the god Mercury or supposedly influenced by the planet Mercury; eloquent, clever, shrewd, thievish, etc.
having qualities suggestive of mercury; quick, quick-witted, volatile, changeable, fickle, etc.

Origin: ME < L mercurialis

noun

a drug or preparation containing mercury

Related Forms:

See mercurial in American Heritage Dictionary 4

adjective

often Mercurial
a. Roman Mythology Of or relating to the god Mercury.
b. Astronomy Of or relating to the planet Mercury.
Having the characteristics of eloquence, shrewdness, swiftness, and thievishness attributed to the god Mercury.
Containing or caused by the action of the element mercury.
Quick and changeable in temperament; volatile: a mercurial nature.

noun

A pharmacological or chemical preparation containing mercury.

Origin:

Origin: Middle English, of the planet Mercury

Origin: , from Latin mercuriālis, of the god or planet Mercury

Origin: , from Mercurius, Mercury

Related Forms: