Lewis Short
contrĭbūtĭo (noun F) : contribuo (postclass.).
* A dividing, distributing: debiti et crediti,Dig. 16, 2, 1: in contributionem venire,ib. 24, 3, 7, § 4; 35, 2, 30, § 8.
* A contribution: omnium,Dig. 14, 2, 1.
Charlton T. Lewis, Charles Short, A Latin Dictionary