IO definition

Topics IO Definition

WordNet

(1) The closest of Jupiter's moons; has active volcanoes

(2) (Greek mythology) a maiden seduced by Zeus; when Hera was about to discover them together Zeus turned her into a white heifer

WiktionaryText

After , daughter of Inachus. See Io (mythology).

A moon of Jupiter, known for its volcanic activity, peppered with about 400 active volcanoes.
Io, daughter of Inachus.