Pronunciation: (pō-sīd'n, pu-), [key]
1. the ancient Greek god of the sea, with the power to cause earthquakes, identified by the Romans with Neptune.
2. Mil.a 34-foot (10-m), submarine-launched U.S. ballistic missile with up to 10 warheads and a range of 2800 miles (4502 km).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.