Reciprocation
Reciprocation (re*sip"ro*kā"shun) , noun
[Latin reciprocatio: compare French réciprocation.]
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. — Sir T. Browne