Lewis & Short

commūtātĭo, ōnis, f. [commuto], a changing, change, alteration (in good prose).

  1. I. In gen.: annuae, Cic. Inv. 1, 34, 59; cf.: tempestatum atque caeli, id. Div. 2, 42, 89: temporum, id. Tusc. 1, 28, 68: crebrae aestuum, Caes. B. G. 5, 1: magnae rerum, id. B. C. 3, 68: ordinis, Quint. 9, 1, 6: subita, Nep. Dion, 6, 1: ventorum, Col. 11, 2, 94: morum aut studiorum, Cic. Lael. 21, 77: civiles, id. Fam. 5, 12, 4.
  2. II. Esp.
    1. A. In rhet.
      1. 1. A figure of speech; a reciprocal opposition or change, = ἀντιμεταβολή (cf. Quint. 9, 3, 85), Auct. Her. 4, 28, 39.
      2. 2. A change in words, pronunciation, or method of treatment, Auct. Her. 4, 42, 54 sq.
    2. B. An exchange.
      1. 1. Captivorum, Liv. Epit. 19.
      2. 2. (Acc. to commuto, II. B.) Of words, a conversation, conference, Claud. Quadrig. ap. Gell. 17, 2, 26.