Someone who scavenges, especially one who searches through rubbish for food or useful things.
A child employed to pick up loose cotton from the floor in a cotton mill.
An animal that feeds on decaying matter such as carrion.
A substance used to remove impurities from the air or from a solution.
A person who is employed to sweep streets, pavements, and gutters, keeping them clear of litter.
A machine used to sweep streets.