1 thermionics | Definition of thermionics
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thermionics

noun, plural in form but singular in construction
therm·​ion·​ics | \ ËŒthÉ™r-(ËŒ)mÄ«-ˈä-niks How to pronounce thermionics (audio) \

Definition of thermionics

: physics dealing with thermionic phenomena

First Known Use of thermionics

1909, in the meaning defined above

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