A tributary stream is a body of water that flows into a larger body of water, such as a river or lake. The term 'tributary stream' can be broken down into three parts: an INFLOW, a FEEDER, and an influent. An INFLOW is the flow of water into a larger body of water, while a FEEDER is a stream or river that supplies water to a larger body of water. An influent is a stream or river that has a direct influence on the water quality of a larger body of water. Together, these three terms describe a tributary stream, which is a body of water that flows into a larger body of water.