thermionic valve

thermionic valve
noun
electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
Hypernyms: ↑electronic device
Hyponyms:
Part Holonyms: ↑circuit, ↑electrical circuit, ↑electric circuit
Part Meronyms: ↑anode, ↑cathode, ↑electrode, ↑grid, ↑control grid, ↑plate

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Brit.
[1915-20]

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thermionic valve or thermionic tube noun
A vacuum tube containing a heated cathode from which electrons are emitted, an anode for collecting some or all of these electrons and, generally, additional electrodes for controlling their flow to the anode
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Main Entry:thermion

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thermionic valve,
Especially British. vacuum tube.

Useful english dictionary. 2012.

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