Word Study
castor and pollux
CIDE DICTIONARY
castor and pollux, [Castor and Pollux were twin sons of Jupiter and Leda.].
See Saint Elmo's fire , under Saint. [1913 Webster]
ROGET THESAURUS
castor and pollux
Duality
N duality, dualism, duplicity, biplicity, biformity, polarity, two, deuce, couple, duet, brace, pair, cheeks, twins, Castor and Pollux, gemini, Siamese twins, fellows, yoke, conjugation, dispermy, doublets, dyad, span, two, twin, dual, dualistic, double, binary, binomial, twin, biparous, dyadic, conduplicate, duplex, biduous, binate, diphyletic, dispermic, unijugate, tete-a-tete, coupled, conjugate, both, both the one and the other.For further exploring for "castor and pollux" in Webster Dictionary Online