(very rare) The quality of being mercurious.

A silvery-colored, toxic, metallic chemical element, liquid at room temperature, with atomic number 80 and symbol Hg.

(obsolete) Any of the plants known as mercury, especially the annual mercury or French mercury (Mercurialis annua).

(comparable) Having a lively or volatile character; animated, changeable, quick-witted.

(astronomy) The planet in the solar system with the closest orbit to the Sun, named after the god; represented by ☿.

A newsboy, a messenger. / A footman. / Someone who carries messages between lovers; a go-between. / A newspaper.

plural of mercurial

(chemistry) Any reaction that introduces a covalent mercury bond into a compound

plural of mercuriation

In a mercurial manner.