English noun: reducer | |||
1. | reducer (substance) a substance capable of bringing about the reduction of another substance as it itself is oxidized; used in photography to lessen the density of a negative or print by oxidizing some of the loose silver | ||
Synonyms | reducing agent, reductant | ||
Broader (hypernym) | chemical agent | ||
Narrower (hyponym) | hydrazine | ||
2. | reducer (artifact) pipefitting that joins two pipes of different diameter | ||
Broader (hypernym) | pipe fitting, pipefitting | ||