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 (ĭg-nī′trŏn′, ĭg′nĭ-)
A single-anode, mercury-vapor rectifier in which current passes as an arc between the anode and a mercury-pool cathode, used in power rectification.


(ɪɡˈnaɪtrɒn; ˈɪɡnɪˌtrɒn)
(Electronics) a mercury-arc rectifier controlled by a subsidiary electrode, the igniter, partially immersed in a mercury cathode. A current passed between igniter and cathode forms a hot spot sufficient to strike an arc between cathode and anode
[C20: from igniter + electron]


(ɪgˈnaɪ trɒn, ˈɪg nɪ trɒn)

a rectifying vacuum tube with an auxiliary electrode projecting into a pool of mercury that conducts current when the anode is positive.
[1930–35; igni (te) + -tron]
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References in periodicals archive ?
Important inventions included new lightning arresters, the Ignitron, de-ionizing circuit breakers, the ac-heated radio tube, the iconoscope, the Precipitron air cleaner, the tank gun stabilizer used by the Allies in World War II, the axial flow jet engine that powered America's first jet planes, and the x-ray imaging amplifier now universally used for medical fluoroscopy.
The Series M spot-welding controls are available with solid-state thyristor (SCR) contactor ratings of 63, 150, 300, 750, and 1200 amps, as well as almost any ignitron tube contactor.