D defs.my
Entry 2 senses Webster, 1913

Reciprocation

/(rē̇*sĭp"rō̇*kā"shŭn)/ · Re·cip·ro·ca·tion · IPA
01 n. The act of reciprocating; interchange of acts; a mutual giving and returning; as, the reciprocation of kindness.
  1. 1.
    The act of reciprocating; interchange of acts; a mutual giving and returning; as, the reciprocation of kindness.
  2. 2.
    Alternate recurrence or action; as, the reciprocation of the sea in the flow and ebb of tides.