a nymph who attracted the love of Zeus and was changed into a bear by Hera. Zeus then set her in the sky as the constellation Ursa Major
Callisto in British English2
(kəˈlɪstəʊ)
noun
the second largest (but faintest) of the four Galilean satellites of Jupiter, discovered in 1610 by Galileo. Approximate diameter: 4800 km; orbital radius: 1 883 000 km
See also Galilean satellite
Callisto in American English
(kəˈlɪstoʊ)
noun
1. Classical Mythology
a nymph loved by Zeus and changed into a bear by Hera
2.
the second largest satellite of Jupiter: discovered in 1610 by Galileo