Definition of Dione in US English:

Dione

proper noun

Astronomy
  • A satellite of Saturn, the twelfth closest to the planet, discovered by Cassini in 1684. Icy with a partly cratered and partly smooth surface, it has a diameter of 696 miles (1,120 km).

Origin

Named after a Titan, the mother of Aphrodite, in Greek mythology.

Pronunciation

Dione

/dīˈōnē/