ig·ni·tron ( g-n  tr n , gn-)n. 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. |
ignitron [ɪgˈnaɪtrɒn ˈɪgnɪˌtrɒn]
n
(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
[from igniter + electron]
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