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[pol-uh ks]
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  1. Greek Polydeuces. Classical Mythology. the brother of Castor.Compare Castor and Pollux.
  2. Astronomy. a first-magnitude star in the constellation Gemini.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for pollux

Historical Examples

  • The Century Dictionary gives the color of Pollux as very yellow.

    A Field Book of the Stars

    William Tyler Olcott

  • It forms a large right-angled triangle with Pollux and Betelgeuze.

    A Field Book of the Stars

    William Tyler Olcott

  • Pollux adds 136 his testimony that the wooden seats were in the agora.

  • It was as much as we could to spare a small quantity to the dogs, Castor and Pollux.

    The Desert Home

    Mayne Reid

  • She proved to be the Castor and Pollux privateer of sixteen guns.

    Tales of the Sea

    W.H.G. Kingston

British Dictionary definitions for pollux


  1. the brightest star in the constellation Gemini, lying close to the star Castor. Visual magnitude: 1.15; spectral type: K0III; distance: 34 light yearsSee also Castor
  2. classical myth See Castor and Pollux
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for pollux


twin brother of Castor, name of the beta star of Gemini, 1520s, from Latin, from Greek Polydeukes, literally "very sweet," from polys "much" (see poly-) + deukes "sweet" (see glucose). The contraction of the name in Latin is perhaps via Etruscan [Klein].

Online Etymology Dictionary, © 2010 Douglas Harper

pollux in Science


  1. A bright giant star in the constellation Gemini, with an apparent magnitude of 1.15. Scientific name: Beta Geminorum.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.