REDUCER

Pronunciation (US):

(GB):

 Dictionary entry overview: What does reducer mean? 

• REDUCER (noun)
  The noun REDUCER has 2 senses:

1. 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

2. pipefitting that joins two pipes of different diameter

  Familiarity information: REDUCER used as a noun is rare.

 Dictionary entry details 

• REDUCER (noun)

Sense 1

Meaning:

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

Classified under:

Nouns denoting substances

Synonyms:

reducer; reducing agent; reductant

Hypernyms ("reducer" is a kind of...):

chemical agent (an agent that produces chemical reactions)

Hyponyms (each of the following is a kind of "reducer"):

hydrazine (a colorless fuming corrosive liquid; a powerful reducing agent; used chiefly in rocket fuels)

Derivation:

reduce (to remove oxygen from a compound, or cause to react with hydrogen or form a hydride, or to undergo an increase in the number of electrons)

Sense 2

Meaning:

Pipefitting that joins two pipes of different diameter

Classified under:

Nouns denoting man-made objects

Hypernyms ("reducer" is a kind of...):

pipe fitting; pipefitting (fitting consisting of threaded pieces of pipe for joining pipes together)