Pairing time

from The Collaborative International Dictionary of English v.0.48

Pairing \Pair"ing\, n. [See {Pair}, v. i.]
   1. The act or process of uniting or arranging in pairs or
      couples.
      [1913 Webster]

   2. See {To pair off}, under {Pair}, v. i.
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   {Pairing time}, the time when birds or other animals pair.
      [1913 Webster]