| Effluent 1. (a.) Flowing out; as, effluent beams. 2. (n.) A stream that flows out of another stream or lake. Thesaurus Entries affluent, bayou, billabong, branch, confluent, confluent stream, dejecta, dejection, dejecture, dendritic drainage pattern, discharge, effused, effusive, egesta, ejecta, ejectamenta, ejection, excrement, excreta, excretes, extravasate, extravasated, extravasation, exudate, exudation, feeder, fork, outbound, outflowing, outgoing, outpouring, outward-bound, prong, transudate, transudation, tributary, waste, waste matter | ![]() |