Lewis & Short

dēcoctĭo, ōnis, f. [decoquo] (postclass.), a boiling down.

  1. I. Prop.
    1. A. Abstr.: lentisci hoc modo, Cael. Aur. Tard. 2, 13, 165.
    2. B. Concret., a decoction, App. Herb. 77; Cael. Aur. Acut. 3, 3, 17.
  2. II. Trop., of an association, a decoction, mixture: unius decoctioni universi respondere cogentur, Cod. Just. 11, 9, 5; cf. Cod. Theod. 4, 9, 3.