Dictionary
re•duc•er
Pronunciation: (ri-dOO'sur, -dyOO'-), [key]—
n.
1. a person or thing that reduces.
2. Photog.
a. an oxidizing solution for lessening the density of an exposed negative.
b. a developing agent.
3. (in plumbing) a coupling decreasing in diameter at one end. Cf.
increaser (def. 2).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.