Neptunian

Full definition of Neptunian

Adjective

1. Of the Neptune of Greek mythology
2. (astronomy) Of or pertaining to Neptune, the eighth planet of the Solar System
3. (geology) Formed by the action of water
4. (physics) Pertaining to the element neptunium

Derived terms

• (astronomy, physics) transneptunian

Noun

1. (science fiction) An inhabitant of the planet Neptune.