Definition from Wiktionary, the free dictionary
- Note: This is uppercase i, not lowercase L.
See also: Appendix:Variations of "io"
- (Greek mythology) The daughter of Inachus river god, and a lover of Zeus.
- (astronomy) A moon of Jupiter, known for its volcanic activity, peppered with about 400 active volcanoes.
- (astronomy) Short for 85 Io, a main belt asteroid; the asteroid shares its name with the Jovian moon
moon of Jupiter
- Io — Wikipedia