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 (ī′ō, ē′ō)
1. Greek Mythology A maiden who was loved by Zeus and transformed by Hera into a heifer.
2. One of the four brightest satellites of Jupiter. It was first sighted by Galileo.

[Latin Īō, from Greek.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


the internet domain name for
(Computer Science) British Indian Ocean Territory


(Classical Myth & Legend) Greek myth a maiden loved by Zeus and turned into a white heifer by either Zeus or Hera


(Celestial Objects) the innermost of the four Galilean satellites of Jupiter, displaying intense volcanic activity. Diameter: 3640 km; orbital radius: 422 000 km


the chemical symbol for
(Elements & Compounds) ionium
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈaɪ oʊ, ˈi oʊ)

1. (in Greek myth) a woman loved by Zeus and changed by him into a heifer, which Hera claimed and put under Argus' guardianship.
2. a large volcanically active moon of Jupiter.




Computers. input/output.


or i.o.,

indirect object.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Io - (Greek mythology) a maiden seduced by ZeusIo - (Greek mythology) a maiden seduced by Zeus; when Hera was about to discover them together Zeus turned her into a white heifer
Greek mythology - the mythology of the ancient Greeks
2.Io - the closest of Jupiter's moons; has active volcanoes
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
`The Isle of Ios is your mother's country and it shall receive you dead; but beware of the riddle of the young children.' (1)
Hearing this, it is said, he hesitated to go to Ios, and remained in the region where he was.
The poet sailed to Ios, after the assembly was broken up, to join Creophylus, and stayed there some time, being now an old man.
According to ( Motherboard , hackers have already taken advantage of the issue and have released an iOS 12.4 jailbreak.
iOS 12, which released less than a month ago on September 17, shares a major chunk of the userbase, indicating a swift adoption among iOS device owners.
The accession of iOS 11.3 has brought many new features and technological advancements with it.
This now looks a wise move because iOS 11 is causing problems...
IBM today unveiled a new IBM MobileFirst for iOS Garage in Bangalore, India.
Multimedia software provider 4Videosoft announced on Friday that it has released a new iOS Data Recovery package for easy retrieval of lost or deleted data from iOS Devices or iTunes Backup File.
The study found that, since its release on 19 September, 60% of iPhone owners have taken the plunge and updated to iOS 6.
As with the Cisco CRS-1 Carrier Routing System, the Cisco XR 12000 Series is powered by Cisco IOS XR software, the industry's first fully modular, self-healing operating system designed specifically for carrier-class routing platforms that can scale and distribute processing.