I. WORDS EXPRESSING ABSTRACT RELATIONS

V. NUMBER

2. DETERMINATE NUMBER

Duality.

[Nouns] 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.

[Verbs] [unite in pairs] pair, couple, bracket, yoke; conduplicate; mate, span [U.S.].

[Adjectives] two, twin; dual, dualistic, double; binary, binomial; twin, biparous; dyadic; conduplicate; duplex [more]; biduous, binate, diphyletic, dispermic, unijugate; tete-a-tete.

coupled; conjugate.

both, both the one and the other.