Table of Contents
Fast Facts
Read Next
Quizzes
Media
Poseidon
Greek mythology
Feedback
Thank you for your feedback
Our editors will review what you’ve submitted and determine whether to revise the article.
External Websites
Britannica Websites
Articles from Britannica Encyclopedias for elementary and high school students.
Poseidon, in ancient Greek religion, god of the sea (and of water generally), earthquakes, and horses. He is distinguished from Pontus, the personification of the sea and the oldest Greek divinity of the waters. The name Poseidon means either “husband of the earth” or “lord of the earth.” Traditionally, he was a son of Cronus (the youngest of the 12 Titans) and of Cronus’s sister and consort Rhea, a fertility goddess. Poseidon was a brother of Zeus, the sky god and chief deity of ancient Greece, and of Hades, god of the underworld. When the three brothers deposed their father, ...(100 of 449 words)