thermion

[ thurm-ahy-uh n, -on; thur-mee-uh n ]
/ ˈθɜrmˌaɪ ən, -ɒn; ˈθɜr mi ən /

noun Physics.

an ion emitted by incandescent material.

Origin of thermion

First recorded in 1910–15; therm- + ion

OTHER WORDS FROM thermion

therm·i·on·ic, adjective therm·i·on·i·cal·ly, adverb

Words nearby thermion

thermette, thermic, thermic fever, thermidor, thermidorian, thermion, thermionic, thermionic current, thermionic emission, thermionic tube, thermionic valve

British Dictionary definitions for thermion

thermion
/ (ˈθɜːmɪən) /

noun

physics an electron or ion emitted by a body at high temperature

Scientific definitions for thermion

thermion
[ thûr′mī′ən ]

An electrically charged particle or ion that is emitted by a heated conducting material. The electrons emitted from the cathodes of electron tubes (such as cathode ray tubes) are thermions.