DICT.TW Dictionary Taiwan

 re·cip·ro·ca·tion /rɪˌsɪprəˈkeʃən/
 交互作用,交換,來往

 Re·cip·ro·ca·tion n.
 1. The act of reciprocating; interchange of acts; a mutual giving and returning; as, the reciprocation of kindness.
 2. Alternate recurrence or action; as, the reciprocation of the sea in the flow and ebb of tides.
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 reciprocation
      n 1: the act of making and return or doing something in return
      2: alternating back-and-forth movement
      3: mutual interaction; the activity of interchanging or
         reciprocating [syn: interchange, give-and-take]