- Class. Myth. a nymph loved by Zeus and changed into a bear by Hera
- the second largest satellite of Jupiter: discovered in 1610 by Galileo
Origin of CallistoClassical Latin from Classical Greek Kallist?
- Greek Mythology A nymph, beloved of Zeus and hated by Hera. Hera changed her into a bear, and Zeus then placed her in the sky as the constellation Ursa Major.
- One of the four brightest satellites of Jupiter. Originally sighted by Galileo, it is the third largest satellite in the solar system.
Origin of CallistoLatin from Greek Kallistō perhaps from kallistos superlative of kalos beautiful