ALL meanings of vacuum tube
vac·u·um tube
V v - noun vacuum tube Also called, especially British, vacuum valve. an electron tube from which almost all air or gas has been evacuated: formerly used extensively in radio and electronics. 1
- noun vacuum tube a sealed glass tube with electrodes and a partial vacuum or a highly rarefied gas, used to observe the effects of a discharge of electricity passed through it. 1
- noun vacuum tube an electron tube from which the air has been evacuated to the highest possible degree 0