- the ancient Greek god of the sea, with the power to cause earthquakes, identified by the Romans with Neptune.
- Military. a 34-foot (10-meter), submarine-launched U.S. ballistic missile with up to 10 warheads and a range of 2800 miles (4502 km).
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for poseidon
The “weapon”--a cone-shaped object with winglets--is launched on top of a repurposed Poseidon nuclear missile.Death at Five Times the Speed of Sound
June 23, 2014
Poseidon put his wits at work and called together all his friends for counsel.Classic Myths
Mary Catherine Judd
Poseidon, I said, this is the crown of wisdom; can I ever hope to have such wisdom of my own?Euthydemus
Hold your tongue, said Alcibiades, for by Poseidon, there is no one else whom I will praise when you are of the company.Symposium
But in this emergency Poseidon came to the aid of the son of Tantalus.
This was Polyphemus, the son of Poseidon, the owner of the cave.
- Greek myth the god of the sea and of earthquakes; brother of Zeus, Hades, and Hera. He is generally depicted in art wielding a tridentRoman counterpart: Neptune
- a US submarine-launched ballistic missile
Word Origin and History for poseidon
Greek god of the sea and earthquakes, Greek Poseidon (Doric Poteidan), of uncertain origin.
Online Etymology Dictionary, © 2010 Douglas Harper
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.