• noun a set of two matched items, similar in appearance and function
  • Two of anything.
  • Two items which correspond to each other. For example, Cooper pairs, electron hole pairs, or Darlingtion pairs.
  • A transmission line consisting of two similar conductors. For example, a two-wire circuit, or a two-wire telephone line. Also called wire pair.
  • Two valence electrons which are shared by two adjacent atoms. Each pair of such electrons forms a bond between said atoms. Also called electron pair.

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