<p><strong>Noun</strong></p><ul><li>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.</li><li>A large volcanically active moon of the planet Jupiter.</li></ul>