thermion

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(t̸hʉr′mī′ən, t̸hʉr′mē-)

noun

Physics a negative or positive ion emitted by an incandescent material

Origin: therm(o)- + ion

Related Forms:

See thermion in American Heritage Dictionary 4

noun
An electrically charged particle, especially an electron, emitted by a conducting material at high temperatures.

Related Forms:

  • thermˌi·onˈic (-mī-ŏnˈĭk) adjective

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