reducing agent

Definitions of reducing agent
  1. 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
    synonyms: reducer, reductant
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    a colorless fuming corrosive liquid; a powerful reducing agent; used chiefly in rocket fuels
    type of:
    chemical agent
    an agent that produces chemical reactions
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