Definition of vacuum tube in English:

vacuum tube

Line breaks: vac¦uum tube


A sealed glass tube containing a near-vacuum which allows the free passage of electric current.
More example sentences
  • A photocell is usually a vacuum tube with two electrodes.
  • In 1948 the vacuum tube was replaced by longer-lived solid-state transistors, marking the dawn of microelectronics.
  • We think of the 1950s as the golden era of the vacuum tube.

Definition of vacuum tube in:

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Pronunciation: ˈdeɪktɪk
denoting a word whose meaning depends on context...