dyad

Noun
  1. Two items of the same kind (synset 113765745)
    is a type of: 2, deuce, ii, two - the cardinal number that is the sum of one and one or a numeral representing this number
    subtypes: doubleton - (bridge) a pair of playing cards that are the only cards in their suit in the hand dealt to a player
    has: fellow, mate - one of a pair
    same as: brace, couple, couplet, distich, duad, duet, duo, pair, span, twain, twosome, yoke

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