io
1 Americannoun
plural
iosnoun
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Classical Mythology. 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.
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Astronomy. a large volcanically active moon of the planet Jupiter.
noun
plural
Iosabbreviation
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abbreviation
noun
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symbol
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One of the four brightest satellites of Jupiter and the fifth in distance from the planet. It was first sighted by Galileo.
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See Note at moon
Etymology
Origin of io
From Hawaiian ʿio
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
My father told me the names: Io, Europa, Ganymede, and one more…He died later that summer.
From Literature
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This effect is dramatic on Io, Jupiter's innermost large moon, where intense gravitational stretching drives constant volcanic eruptions.
From Science Daily
Io's orbit regularly brings it closer to Jupiter, amplifying those tidal forces and making it the most volcanically active body in the solar system.
From Science Daily
"And it may have had a lot more heating in the distant past. But we don't see any volcanoes shooting out of the ice today like we see on Io, and our calculations suggest that the tides aren't strong enough to drive any sort of significant geologic activity at the seafloor."
From Science Daily
May will see the arrival of 007 First Light - the celeb-filled James Bond adventure from Hitman developer IO Interactive.
From BBC
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.