vacuum tube

noun

Definition of vacuum tube

  1. :  an electron tube evacuated to a high degree of vacuum

1859

First Known Use of vacuum tube

1859


VACUUM TUBE Defined for English Language Learners

vacuum tube

noun

Definition of vacuum tube for English Language Learners

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


Medical Dictionary

vacuum tube

noun

Medical Definition of vacuum tube

  1. :  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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