thermionic tube
noun Electronics.
a vacuum tube in which the cathode is heated electrically to cause the emission of electrons by thermal agitation.
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Also called hot-cathode tube.
Origin of thermionic tube
First recorded in 1925–30
Words nearby thermionic tube
thermion, thermionic, thermionic current, thermionic emission, thermionics, thermionic tube, thermionic valve, thermistor, Thermit, thermite, thermite process
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Scientific definitions for thermionic tube
thermionic tube
[ thûr′mī-ŏn′ĭk ]
An electrical component, typically an electron tube, through which electric current flows via the emission of thermions from a heated cathode.
The American Heritage® Science Dictionary
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