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n. A unit of two objects; a pair.

n. A pair or couple

n. an unordered pair

n. dwadasama

n. A union of two; duality.

n. Same as dyad.

n. In mathematics, an unordered, pair; two objects considered as making up one, and as the same one whichever is taken first.

n. two items of the same kind

"Pythagorean system, to denote respectively the _monad_, or active principle of nature; the _duad_, or passive principle; the _triad_, or world emanating from their union; and the _quaterniad_, or intellectual science; the whole number of points amounting to ten, the symbol of perfection and consummation."

2    two    deuce    ii   

doubleton   

duality   

dyad    sextet    monad    wretch    solutionsto    quatrain    septet    weekend-night    smirking    dryad