Definitions

1. noun

relating to or characteristic of the planet Mercury or its inhabitants.

“The mercurian atmosphere is mostly composed of helium and hydrogen.”

2. adjective

having the qualities of Mercury, the Roman messenger god, characterized by swiftness and agility.

“The mercurian athlete was known for his incredible speed and agility on the track.”

3. adjective

relating to or denoting the planet Mercury, especially in relation to its orbit or its position in the solar system.

“The mercurian orbit of the planet makes it difficult to study its surface.”