DionePronunciation: /dʌɪˈəʊni/ AstronomyDefinition of Dione a satellite of Saturn, the twelfth closest to the planet, discovered by Cassini in 1684, being icy with a partly cratered and partly smooth surface (diameter 1,120 km). Origin:named after a Titan, the mother of Aphrodite, in Greek mythologyDione in other Oxford dictionaries Definition of Dione in the US English dictionary
