Lewis & Short

rĕcī̆prŏcātĭo, ōnis, f. [reciproco].

  1. I. Lit., a going back upon itself, a returning by the same way, retrogression (postAug.): aestus, i. e. the reflux. ebb, Plin. 9, 8, 9, § 29: fili, id. 11, 24, 28, § 83: caprorum, id. 8, 50, 76, § 201: errantium siderum, Gell. 14, 1, 23.
  2. II. Trop., alternation, reciprocation: talionum, retaliation, Gell. 20, 1, 18: animorum, the transmigration of souls, metempsychosis, Tert. ad Nat. 1, 19.
      1. 2. In gram., reciprocal action, in the pron. recipr., Prisc. p. 940 P.