thermionic
adjective
therm·ion·ic
ˌthər-(ˌ)mī-ˈä-nik 
: relating to, using, or being the emission of charged particles (such as electrons) by an incandescent material
Examples of thermionic in a Sentence
Recent Examples on the Web
The new thermionic cooler from Prunnila and his colleagues is built to control phonon flow.
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IEEE Spectrum, 12 Sep. 2023
The new coolers fall into the class of thermionic devices, which shed heat in the form of electrons.
—IEEE Spectrum, 12 Sep. 2023
The thermionic diode heat engine invented by Nottingham and Hatsopoulos in the 1950s finally went all the way and produced power with no moving parts.
—Charles A. Berg, The New York Review of Books, 6 June 2019
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IEEE Spectrum, 12 Sep. 2023
The new coolers fall into the class of thermionic devices, which shed heat in the form of electrons.
—IEEE Spectrum, 12 Sep. 2023
The thermionic diode heat engine invented by Nottingham and Hatsopoulos in the 1950s finally went all the way and produced power with no moving parts.
—Charles A. Berg, The New York Review of Books, 6 June 2019
Cite this Entry
“Thermionic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thermionic. Accessed 21 Jul. 2025.
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