Mercurius

Part of speech: noun

Definitions

1. A historical term referring to the chemical element mercury, a heavy, silvery metal liquid at room temperature; also denotes the Roman god Mercury, associated with commerce, communication, and travel; and used in alchemical texts to indicate the principle of transformation and fluidity
2. An archaic or symbolic name for the element mercury, known for its unique liquid metal state; the mythological messenger deity of Roman mythology linked to speed and negotiation; and a concept in early science representing change and the bridge between physical and spiritual substances
3. A classical name used for the metallic element mercury characterized by its liquidity and toxicity; the swift-footed Roman divinity who served as a patron of merchants and travelers; and an alchemical symbol embodying mutability and the union of opposites in chemical processes

Etymology: The Roman god Mercury gave his name to the planet, the metal, and an alchemical principle, and the name itself is one of the few in Latin whose origin nobody has settled. Scholars have proposed connections to the Latin "merx," meaning merchandise, which would fit the god's patronage of trade, but no derivation has won general agreement. The Romans identified their Mercurius with the Greek Hermes, god of messengers, commerce, and travelers. The metal's name is the older sense in English-speaking chemistry, and the alchemists used the same Latin word for a principle rather than a substance. In alchemical writing, "mercurius" could refer to the ordinary quicksilver but also to a hypothetical essence of fluidity and change, a sense that let the word carry both a physical liquid and a theory of transformation. Its planetary use followed the same pattern, since the ancients named the fast-moving planet after the swift messenger god.

Synonyms: mercury, hermes, messenger god, planet Mercury, quicksilver