Meaning

1 senses
  1. (historical)An electronic device incorporating electrons from a glowing cathode inside an evacuated glass tube, functioning as a switch, amplifier etc.

    electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope

Forms

plural: thermionic valves

Synonyms

5 synonyms
Close in meaning

Word family

1 related words

See also

neighbours in the dictionary
thermionic valve — meaning, examples, forms, synonyms | Krumeto