<p><strong>Noun</strong></p><ul><li>Genitive Perseī: A hero, the son of Zeus and Danaë, who slew the Gorgon Medusa, and afterward saved Andromeda from a sea monster.</li><li><strong>Astronomy:</strong> A northern constellation between Cassiopeia and Taurus, containing the variable star Algol.</li></ul><p><strong>End of Response</strong></p>