Lewis & Short

concinnātĭo, ōnis, f. [concinno] (post-class.).

  1. I. In economics, an adjusting, preparing: aquae marinae, Auct. Lemmat. ap. Cato, R. R. 106.
  2. II. Transf., a making, composing: epistulae, Aus. Ep. 17; cf. id. ib. 7 and 15: metrorum, Mar. Vict. p. 2547 P.