thermionic tube

See synonyms for thermionic tube on
  1. a vacuum tube in which the cathode is heated electrically to cause the emission of electrons by thermal agitation.

Origin of thermionic tube

First recorded in 1925–30

Words Nearby thermionic tube Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

Scientific definitions for thermionic tube

thermionic tube

[ thûr′mī-ŏnĭk ]

  1. An electrical component, typically an electron tube, through which electric current flows via the emission of thermions from a heated cathode.

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