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

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

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

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

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

plural of mercuriation

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

plural of mercurial

Chronic mercury poisoning.

(very rare) The quality of being mercurious.