Dictionary
2 ENTRIES FOUND:

vacuum tube

noun

: a glass tube that was used in the past in computers, televisions, etc., to control the flow of electricity

Full Definition of VACUUM TUBE

:  an electron tube evacuated to a high degree of vacuum

First Known Use of VACUUM TUBE

1859

vacuum tube

noun    (Medical Dictionary)

Medical Definition of VACUUM TUBE

:  an electronic device in which conduction by electrons takes place through a vacuum within a sealed glass or metal container and which has various uses based on the controlled flow of electrons

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