Pronunciation: (pûr'sē-us, -syOOs), [key]
—gen. -se•iPronunciation: (-sē-ī") [key] for 3.
1. Class. Myth.a hero, the son of Zeus and Danaë, who slew the Gorgon Medusa, and afterward saved Andromeda from a sea monster.
2. Astron.a northern constellation between Cassiopeia and Taurus, containing the variable star Algol.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.