feeder

noun

1. an animal being fattened or suitable for fattening
2. someone who consumes food for nourishment
3. a branch that flows into the main stream
4. a machine that automatically provides a supply of some material"the feeder discharged feed into a trough for the livestock"
5. an outdoor device that supplies food for wild birds
6. an animal that feeds on a particular source of food"a bark feeder"