mercurial

Of or relating to the god Mercury.

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 pharmacological or chemical preparation containing mercury.

[capitalized] Pertaining to the god Mercury; having the form or qualities attributed to Mercury.

Like Mercury in character; having the moral or mental qualities ascribed to the god Mercury, or supposed by astrologists to belong to those under his star, the planet Mercury; light-hearted; gay; active; sprightly; flighty; fickle; changeable; volatile.

Pertaining to Mercury as god of trade; hence, pertaining to trade or money-making: as, mercurial pursuits.