1. reducer

noun. pipefitting that joins two pipes of different diameter.


  • pipefitting

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2. reducer

noun. 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.


  • reducing agent
  • reductant
  • hydrazine

Sentences with reducer

1. Noun, singular or mass
Finish this pipe off with a 3-to-4 reducer to form a nice base for attaching the head of your choice to your figure.