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thermionic current

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Definition of thermionic current

: an electric current due to the directed movements of thermions (as in the electric discharge through a vacuum tube with the cathode incandescent)

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“Thermionic current.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thermionic%20current. Accessed 8 Mar. 2021.

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