ignitron
noun
ig·ni·tron
ig-ˈnī-ˌträn 
: a mercury-containing rectifier tube in which the arc is struck again at the beginning of each cycle by a special electrode separately energized by an auxiliary circuit
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“Ignitron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ignitron. Accessed 3 Dec. 2024.
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