Hypertext Webster Gateway: "Duad"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Duad \Du"ad\, n. [See {Dyad}.]
A union of two; duality. [R.] --Harris.
From WordNet (r) 1.7 (wn)
duad
n : two items of the same kind [syn: {couple}, {doubleton}, {pair},
{twosome}, {twain}, {brace}, {span}, {yoke}, {couplet},
{distich}, {duo}, {duet}, {dyad}]
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