Definition of thermionic valve in English:

thermionic valve

Line breaks: thermi|on¦ic valve
(US thermionic tube)


  • A device giving a flow of thermionic electrons in one direction, used especially in the rectification of a current and in radio reception.
    More example sentences
    • It's rather odd therefore that even though we ditched thermionic valves for transistors and integrated circuits many years ago, the cathode ray tube has remained the most cost-effective display system.
    • The speaker or singer uses a microphone feeding into the above-mentioned amplifier, which incorporates vacuum tubes (thermionic valves).
    • The basic thermionic tube with three electrodes is called a triode in view of the number of electrodes.

More definitions of thermionic valve

Definition of thermionic valve in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day astrogation
Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
(in science fiction) navigation in outer space