/ Dictionary / Index C Castor and Pollux: Meaning and Definition of Find definitions for: Cas'tor and Pol'lux Pronunciation: [key] — Class. Myth. Class. Myth. twin sons of Leda and brothers of Helen, famous for their fraternal affection and regarded as the protectors of persons at sea. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. castor castor bean Related Content Daily Word Quiz: cosmology Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language