io

or 'i·o

[ ee-oh ]

noun,plural i·os.
  1. a small, solitary hawk, Buteo solitarius, having two plumage phases and breeding only on the Island of Hawaii, where it is a rare species and the only indigenous bird of prey: classified as near threatened.

Origin of io

1
From Hawaiian ʿio
  • Also called Ha·wai·ian hawk [huh-wahy-uhn hawk, -wah yuhn] /həˈwaɪ ən ˈhɔk, -ˈwɑ yən/ .

Other definitions for Io (2 of 7)

Io1
[ ahy-oh, ee-oh ]

noun
  1. 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.

  2. Astronomy. a large volcanically active moon of the planet Jupiter.

Other definitions for Io (3 of 7)

Io2
[ ahy-oh, ee-oh ]

noun,plural I·os.

Other definitions for Io (4 of 7)

Io3

Symbol, Chemistry.

Other definitions for Io. (5 of 7)

Io.

abbreviation
  1. Iowa.

Other definitions for I/O (6 of 7)

I/O

Other definitions for I.O. (7 of 7)

I.O.

abbreviation
  1. indirect object.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

British Dictionary definitions for io (1 of 5)

io

the internet domain name for
  1. British Indian Ocean Territory

British Dictionary definitions for Io (2 of 5)

Io1

/ (ˈaɪəʊ) /


noun
  1. Greek myth a maiden loved by Zeus and turned into a white heifer by either Zeus or Hera

British Dictionary definitions for Io (3 of 5)

Io2

/ (ˈaɪəʊ) /


noun
  1. the innermost of the four Galilean satellites of Jupiter, displaying intense volcanic activity. Diameter: 3640 km; orbital radius: 422 000 km

British Dictionary definitions for Io (4 of 5)

Io3

the chemical symbol for
  1. ionium

British Dictionary definitions for I/O (5 of 5)

I/O

abbreviation for
  1. input/output

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for Io

Io

[ īō, ēō ]


  1. One of the four brightest satellites of Jupiter and the fifth in distance from the planet. It was first sighted by Galileo. See Note at moon.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.