A type of electron tube that controls electron current through vacuum between electrodes within a sealed container, usually of glass or metal and often designed to be easily installed in and removed from the equipment in which it is used.
A small aperture.
An opening in a volcano from which lava or gas flows.
Opportunity of escape or passage from confinement or privacy; outlet.
The opening at the breech of a firearm, through which fire is communicated to the powder of the charge.
Ventriloquism.
A slit in the seam of a garment.
Emission; escape; passage to notice or expression; publication; utterance.
An opening through which gases, especially air, can pass.
The excretory opening of lower orders of vertebrates.
A rant; a long session of expressing verbal frustration.
In steam boilers, a sectional area of the passage for gases divided by the length of the same passage in feet.
To allow gases to escape.
To determine the sex of (a chick) by opening up the anal vent or cloaca.
To ventilate; to use a ventilator; to use ventilation.
To express a strong emotion.
To snuff; to breathe or puff out; to snort.
To sell; to vend.
To allow to escape through a vent.