- a person or thing that reduces.
- Photography.
- an oxidizing solution for lessening the density of an exposed negative.
- a developing agent.
- (in plumbing) a coupling decreasing in diameter at one end.
- a chemical solution used to lessen the density of a negative or print by oxidizing some of the blackened silver to soluble silver compounds
- a pipe fitting connecting two pipes of different diameters
- a person or thing that reduces
