Rec"ti*fi`er (r?k"t?*f?`?r), n.
1.
One who, or that which, rectifies.
2.
Specifically: (a) Naut. An instrument used for determining and rectifying the variations of the compass on board ship. (b) Chem. A rectificator.
<-- (Elec.) A device to convert alternating current to direct current. -->
© Webster 1913.