Duad

from WordNet (r) 3.0 (2006)

duad
    n 1: two items of the same kind [syn: {couple}, {pair},
         {twosome}, {twain}, {brace}, {span}, {yoke}, {couplet},
         {distich}, {duo}, {duet}, {dyad}, {duad}]

from The Collaborative International Dictionary of English v.0.48

Duad \Du"ad\, n. [See {Dyad}.]
   A union of two; duality. [R.] --Harris.
   [1913 Webster]

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