A device through which electric current can flow in only one direction; spec. one for converting alternating current into direct current. Also in…

a form of rectifier (rectifier, n. 4) in which rectification takes place at the junction between a metal and an oxide of the metal or a semiconductor.

A thermionic diode rectifier utilizing an arc discharge in mercury vapour or gas at very low pressure.

A kind of mercury-arc rectifier capable of handling large currents and having a pool cathode, a single anode, and an igniter to initiate the arc…

Electronics. A device that converts a sinusoidal or other periodic wave into a square wave of the same period.