Io Hear it!

Io1 definition

Io (ī′ō′; for 2, also ē′ō′)

noun

  1. Gr. Myth. a maiden loved by Zeus and changed into a heifer by jealous Hera or, in some tales, by Zeus to protect her: she is watched by Argus and is driven to Egypt, where she regains human form
  2. the third largest satellite of Jupiter: discovered in 1610 by Galileo and found in 1979 to be volcanically active

Etymology: L < Gr Iō

Io2 definition

Io

ionium

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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