Etymology
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rectifier (n.)

"one who or that which rectifies" in any sense, 1610s, agent noun from rectify.

updated on May 28, 2021

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Definitions of rectifier from WordNet

rectifier (n.)
electrical device that transforms alternating into direct current;
rectifier (n.)
a person who corrects or sets right;
a rectifier of prejudices
From wordnet.princeton.edu, not affiliated with etymonline.