reductant

名词 reductant:

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 slackened silver
   同义词：reducing agent, reducer

re.duc.tant

n.（名词）
A reducing agent.
还原剂

来源：
reduct(ion)
reduct(ion)
-ant
-ant