Lewis & Short

contrĭbūtĭo, ōnis, f. [contribuo] (postclass.).

  1. I. A dividing, distributing: debiti et crediti, Dig. 16, 2, 1: in contributionem venire, ib. 24, 3, 7, § 4; 35, 2, 30, § 8.
  2. II. A contribution: omnium, Dig. 14, 2, 1.