[poh-sahyd-n, puh-] 
| 1. | the ancient Greek god of the sea, with the power to cause earthquakes, identified by the Romans with Neptune. |
| 2. | Military. a 34-foot (10-m), submarine-launched U.S. ballistic missile with up to 10 warheads and a range of 2800 miles (4502 km). |
| Po·sei·don (pō-sīd'n, pə-) n. Greek Mythology The god of the waters, earthquakes, and horses, and brother of Zeus. |
The Greek name for Neptune, the god in classical mythology who ruled the sea.
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