Definition of Callisto in English:

Callisto

proper noun

  • 1Greek Mythology
    A nymph who was changed into a bear by Zeus.

    See also ursa major
  • 2Astronomy
    One of the Galilean moons of Jupiter, the eighth-closest satellite to the planet, icy with a dark, cratered surface (diameter 4,800 km).

Pronunciation:

Callisto

/kəˈlɪstəʊ/