WordReference Random House Learner's Dictionary of American English © 2026
Io.,
an abbreviation of:
I/O, an abbreviation of:
WordReference Random House Unabridged Dictionary of American English © 2026- Place NamesIowa.
I/O, an abbreviation of:
i•o
(ē′ō),USA pronunciation n., pl. i•os.
I•o (ī′ō, ē′ō),USA pronunciation n.
I•o (ī′ō, ē′ō),USA pronunciation n., pl. I•os.
Io, [Symbol, Chem.]
Io.,
I/O,
- Birdsa small hawk, Buteo solitarius, having two plumage phases and occurring only on the island of Hawaii, where it is a rare species and the only living indigenous bird of prey. Also called Hawaiian hawk.
- Hawaiian ‘io
I•o (ī′ō, ē′ō),USA pronunciation n.
- Mythology[Class. Myth.]a woman who, being loved by Zeus, was transformed into a white heifer and was, at the wish of Hera, first guarded by Argus and later pursued through the world by a gadfly until she reached Egypt, where she resumed her true shape: identified by the Egyptians with Isis.
- Astronomya large volcanically active moon of the planet Jupiter.
I•o (ī′ō, ē′ō),USA pronunciation n., pl. I•os.
- Chemistry, InsectsSee Io moth.
Io, [Symbol, Chem.]
- ionium.
Io.,
- Place NamesIowa.
I/O,
- Naval Termsinboard-outboard.
- Computinginput/output.
- Grammarindirect object.
'i/O' also found in these entries (note: many are not synonyms or translations):
bellows
- C.I.O.
- Congress of Industrial Organizations
- echinoderm
- F.I.O.
- inboard-outboard
- input/output
- io
- IOC
- I.O.F.
- Io moth
- I.O.O.F.
- IOU
- kemp
- O, o
- O.A.S.I.
- OTA
- ovovitellin
- ovoviviparous
- vowel
- yew
- sterlet