DICT.TW Dictionary Taiwan

 sin·gle·ton /ˈsɪŋgəltən/
 一個,獨生子,獨身

 Sin·gle·ton n. In certain games at cards, as whist, a single card of any suit held at the deal by a player; as, to lead a singleton.
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 singleton
      n 1: a single object (as distinguished from a pair)
      2: a set containing a single member
      3: the playing card that is the only card in a suit held in a
         bridge hand as initially dealt