Synonyms for Thermionic valve:

• n.

  •electron tube (noun)
  • electron tube.
  •Other relevant words: (noun)
  • electronic device.
  •thermionic tube (noun)
  • thermionic tube.
  •thermionic vacuum tube (noun)
  • thermionic vacuum tube.
  •thermionic valve (noun)
  • vacuum tube.

• Other synonyms:

  •Other relevant words (noun):
  • tube,
  • radio tube,
  • valve.