Definition of audion in English:

audion

noun

Radio
historical
  • An early form of triode valve, developed by Lee De Forest and used as a detector and amplifier for radio signals. Frequently attributive, as "audion amplifier", "audion tube", etc.

Origin

Early 20th century. From classical Latin audīre to hear + -on.

Pronunciation

audion

/ˈɔːdɪɒn/