Io

1 of 2

noun

ˈī-(ˌ)ō 

: a maiden loved by Zeus and changed by him into a heifer so that she might escape the jealous rage of Hera

I/O

2 of 2

abbreviation

input/output

Word History

Etymology

Noun

Latin, from Greek Iō

First Known Use

Noun

1563, in the meaning defined above

Phrases Containing Io

• Io moth

Medical Definition

Io

symbol

ionium