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The Collaborative International Dictionary

Io \I"o\, n.; pl. Ios. [L.; cf. Gr. "iw`.] An exclamation of joy or triumph; -- often interjectional.


Io \I"o\ ([=e]"[=o]), prop. n. [Gr. 'Iw`.]

  1. In Greek mythology, the beautiful daughter of Inachus, king of Argos, Greece, who was changed by Hera (Juno), in a fit of jealousy, into a white heifer, and placed under the watch of Argus of the hundred eyes. When Argus was killed by Hermes at the command of Zeus, the heifer was maddened by a terrible gadfly sent by Hera, and wandered about until she arrived in Egypt. There she recovered her original shape, and bore Epaphus to Zeus. Epaphus became the ancestor of [AE]gyptus, Damaus, Cepheus, and Phineus. She was identified by the Egyptians with Isis. According to another legend, Io was carried off by Phoenician traders who landed in Argos. The myth is generally explained to be Aah or the moon wandering in the starry skies, symbolized by the hundred-eyed Argus; her transformation into a horned heifer representing the crescent moon.

    Greek mythology, too, knew her [Astarte] as I[^o] and Europa, and she was fitly symbolised by the cow whose horns resemble the supine lunar crescent as seen in the south.
    --Seyce (Anc. Empires, p. 195).

  2. One of the large moons of the planet Jupiter, remarkable for its intense volcanic activity, as observed in fly-bys of space probes. It was named after the mythological Io.

Douglas Harper's Etymology Dictionary

in Greek mythology, daughter of the river god Inachus, she was pursued by Zeus and consequently changed into a heifer. The Jovian moon was discovered in 1610 and named for her by Galileo.


Etymology 1 n. A type of moth, the io moth. Etymology 2

interj. An exclamation of joy or triumph.

Io (mythology)

Io (; ) was, in Greek mythology, one of the mortal lovers of Zeus. She was the daughter of Inachus and the nymph Melia. She was an ancestor of many kings and heroes such as: Perseus, Cadmus, Herakles, Minos, Lynceus, Cepheus, and Danaus.


Io, IO, I/O, i/o, or i.o. may refer to:

Io (programming language)

Io is a pure object-oriented programming language inspired by Smalltalk, Self, Lua, Lisp, Act1, and NewtonScript. Io has a prototype-based object model similar to the ones in Self and NewtonScript, eliminating the distinction between instance and class. Like Smalltalk, everything is an object and it uses dynamic typing. Like Lisp, programs are just data trees. Io uses actors for concurrency.

Remarkable features of Io are its minimal size and openness to using external code resources. Io is executed by a small, portable virtual machine.

Io (voievodal title particle)

Io is a particle of a title used mainly by Romanian royalty from both Moldavia and Walachia, preceding their names and the complete list of titles, in all their documents (written or engraved), since the formation of the respective principalities up to the Hohenzollern dynasty in the 19th century.

First used by the Assenid kings, the particle is the abbreviation of name Ioan (English: John, Latin: Ioannes), which comes from the original Hebrew Yohanan, meaning "God has favoured". Thus, in this context, the particle has the meaning "By the grace of God" (see divine right), rather than alluding to an actual name of John. It was always spelled with a Latin I and a Greek omega (in both Latin and Cyrillic documents). In some Latin accounts it was replaced by "Iohannes".

Io (opera)

Io is an unfinished opera by Jean-Philippe Rameau in the form of a one-act acte de ballet. The date of its composition is unknown and it was probably unperformed during Rameau's lifetime. Its unfinished state meant that it was once believed to be Rameau's last opera, but Io contains a duet which appears in revised form in Les fêtes de Polymnie (1745). This has led the musicologist Graham Sadler to conclude that Io must predate 1745 and that the librettist was Louis de Cahusac, who also wrote the words for Les fêtes, because French librettists did not borrow from other writers.

Io (island)

Io , is an uninhabited Greek islet, close to the coast of Lasithi, eastern Crete, and in the Libyan Sea. It is part of the Lefki municipality.

Io (moon)

Io is the innermost of the four Galilean moons of the planet Jupiter. It is the fourth-largest moon, has the highest density of all the moons, and is the driest known object in the Solar System. It was discovered in 1610 and was named after the mythological character Io, a priestess of Hera who became one of Zeus's lovers.

With over 400 active volcanoes, Io is the most geologically active object in the Solar System. This extreme geologic activity is the result of tidal heating from friction generated within Io's interior as it is pulled between Jupiter and the other Galilean satellites— Europa, Ganymede and Callisto. Several volcanoes produce plumes of sulfur and sulfur dioxide that climb as high as above the surface. Io's surface is also dotted with more than 100 mountains that have been uplifted by extensive compression at the base of Io's silicate crust. Some of these peaks are taller than Mount Everest. Unlike most satellites in the outer Solar System, which are mostly composed of water ice, Io is primarily composed of silicate rock surrounding a molten iron or iron-sulfide core. Most of Io's surface is composed of extensive plains coated with sulfur and sulfur-dioxide frost.

Io's volcanism is responsible for many of its unique features. Its volcanic plumes and lava flows produce large surface changes and paint the surface in various subtle shades of yellow, red, white, black, and green, largely due to allotropes and compounds of sulfur. Numerous extensive lava flows, several more than in length, also mark the surface. The materials produced by this volcanism make up Io's thin, patchy atmosphere and Jupiter's extensive magnetosphere. Io's volcanic ejecta also produce a large plasma torus around Jupiter.

Io played a significant role in the development of astronomy in the 17th and 18th centuries. It was discovered in January 1610 by Galileo Galilei, along with the other Galilean satellites. This discovery furthered the adoption of the Copernican model of the Solar System, the development of Kepler's laws of motion, and the first measurement of the speed of light. From Earth, Io remained just a point of light until the late 19th and early 20th centuries, when it became possible to resolve its large-scale surface features, such as the dark red polar and bright equatorial regions. In 1979, the two Voyager spacecraft revealed Io to be a geologically active world, with numerous volcanic features, large mountains, and a young surface with no obvious impact craters. The Galileo spacecraft performed several close flybys in the 1990s and early 2000s, obtaining data about Io's interior structure and surface composition. These spacecraft also revealed the relationship between Io and Jupiter's magnetosphere and the existence of a belt of high-energy radiation centered on Io's orbit. Io receives about 3,600 rem (36 Sv) of ionizing radiation per day.

Further observations have been made by Cassini–Huygens in 2000 and New Horizons in 2007, as well as from Earth-based telescopes and the Hubble Space Telescope.

From the surface of Io, Jupiter would subtend an arc of 19.5°, making Jupiter to appear 39 times the apparent diameter of our Moon.

IO (band)

IO (pronounced the English way 'eye-oh', as opposed to the German way 'ee-oh') is a German alternative rock band, formed in 2006 after the breakup of Guano Apes. Original Guano Apes members Henning Rümenapp ( guitar), Stefan Ude ( bass) and Dennis Poschwatta ( drums) reunited after having spent time on individual projects - of which Poschwatta's band Tamoto was the only real band, as well as the most successful. IO was then completed by adding American singer Charles Simmons to the lineup.

The band released their debut album For the Masses on August 1, 2008, and toured several times, but was put on hold after Guano Apes reunited in 2009. As stated in the news section of IO's website, the band members "don't quite know yet" what consequences the Guano Apes reunion will have for IO.

Io (English band)

io is an experimental rock band from Birmingham, UK. The band currently consists of Al Lawson ( guitar/ vocals), Stu Atkins ( guitar), Dave Wright ( drums), and Steve Wood ( bass).

The band formed in 2006 after the collapse of two Birmingham bands, State of Serenity and Project-7. Al Lawson (guitars/vocals), Stu Atkins (guitar), Dave Wright (drums), and Tom Lawson (bass) started writing loud, progressive, instrumental music that evoked the feeling of Mogwai, ISIS and Red Sparowes. After cementing a live show described as "so spectacular and powerful it could have soundtracked the moon's conversion from a glowing, white golf ball into a fearsome, reddish planet", the band entered the studio to record their debut EP, itwaslostinthefirewestarted. Recorded by Jay at Dub:Rek studios in Derby, the self-released EP garnered praise such as "a 'choose your own adventure' book for audiophiles" and "sublime, contemplative, and explosive epic noise". In August 2007, the band tour the EP in the UK with friends Death of London and To the Bones.

March 2008 saw the European release of io's debut album, Monolith. Released by short lived French label Arghh! records (Mothertrucker, God is an Astronaut, The Mantra Above the Spotless Melt Moon) the album consisted of the four tracks from itwaslostinthefirewestarted together with two new tracks, "Where we're going we don't need roads" and "Farewell, my concubine". Favourable reviews in France, Germany and Italy allowed io to tour mainland Europe to support the release. After the tour James Black, who had been playing bass since the recording of the debut EP, left to band to pursue his love of dubstep. He currently DJs under the name Arctic.

A struggle to replace James saw a quiet end to 2008. In 2009 Steve Wood took over on bass and the band began playing live and writing for their second full length album. The album "Materioptikon" was released in November on Grammatical Records. The album received positive reviews such as "a stunning piece of progressive hardcore/post-rock mashup" and "A beautiful, melodic, Post-Rock epic that forces repeated listens".

Usage examples of "io".

It was a proof how much a single evening had sufficed to increase and to refine the love of the Athenian for Ione, that whereas he had confided to Clodius the secret of his first interview with her, and the effect it had produced on him, he now felt an invincible aversion even to mention to him her name.

The fast affinity exchange which followed made Ione feel woefully inadequate.

Io, George Munster flowed gradually to the shovel, extended a pseudopodium, seized the shovel, and with it managed to dig a symbolic amount of soil.

Offler, Om and Blind Io, all important gods, and also to Anoia, a minor goddess of Things That Stick In Drawers.

Ione by a tie that memory could not break, she would be driven to concentrate her thoughts in him--that his arts would complete his conquest, and that, according to the true moral of the Roman and the Sabine, the empire obtained by force would be cemented by gentler means.

io gli domandai perché volesse andarci proprio lui, perché non dovessi andare io, invece, e lui restare sulla lancia.

E io, che cavolo avevo detto a quel reporter due sere prima al pranzo promozionale?

The most frequent combinations of vowels in hiatus are ea, eo, ie, io, oa.

Ione fired again and again, concentrating on one wall now, mauling it to smithereens.

E che diritto avevo, io, di intervenire nella fosca contesa che li spingeva a versare reciprocamente il loro sangue?

Brief meeting with officials from Io: the ecopoetic plan, Zo said to them, casually, seemed far too slow.

La serenità d'animo che avevo tratto dal mio abbandono ai voleri della Provvidenza, dalla pacata attesa delle disposizioni celesti, sembrava essersi dissolta, ed io, in un certo tempo, avevo smarrito la facoltà di concentrare la mia mente su qualcosa di diverso dal progetto ossessivo di una traversata fino alla terraferma: progetto che mi dominava a tal punto, e accompagnato da un così bruciante desiderio, da non potervi resistere.

Ione reprogrammed her suit actuators to take it into account, making sure the serjeants didn’t go power leaping and compensating for the coriolis factor.

Sono solo contrario all’idea di cadere io, idea che considero molto brutta.

I was thinking of perhaps just a nice duck-egg blue with a few stars, said Blind Io.