'Duad' definitions:

Definition of 'duad'

(from WordNet)
noun
Two items of the same kind [syn: couple, pair, twosome, twain, brace, span, yoke, couplet, distich, duo, duet, dyad, duad]

Definition of 'Duad'

From: GCIDE
  • Duad \Du"ad\, n. [See Dyad.] A union of two; duality. [R.] --Harris. [1913 Webster]