thermionic emission
noun
therm·ion·ic emission
ˌthər-(ˌ)mī-ˈän-ik- 
: emission of particles (as electrons) from materials at high temperature due to the heat energy imparted to them
Dictionary Entries Near thermionic emission
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“Thermionic emission.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/thermionic%20emission. Accessed 18 Dec. 2024.
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