tube

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tube,

in electronics: see electron tubeelectron tube,
device consisting of a sealed enclosure in which electrons flow between electrodes separated either by a vacuum (in a vacuum tube) or by an ionized gas at low pressure (in a gas tube).
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.

Tube

A long, hollow cylinder, or other hollow shape; typically a flexible or thin-walled metal cylinder, as opposed to a pipe.

tube

[′tüb]
(biology)
A narrow channel within the body of an animal or plant.
(electronics)
(engineering)
A long cylindrical body with a hollow center used especially to convey fluid.
(geology)
A passage in a cave having smooth sides and an elliptical to nearly circular cross section.
(ordnance)
The main part of a gun, the cylindrical piece of metal surrounding the bore; tube is frequently used in referring to artillery weapons, and barrel is more frequently used in referring to small arms.

tube

1. A thin-walled pipe.
2.See lamp.

tube

1. Anatomy
b. any hollow cylindrical structure
2. Botany
a. the lower part of a gamopetalous corolla or gamosepalous calyx, below the lobes
b. any other hollow structure in a plant
3. Brit the tube
a. an underground railway system
b. the tunnels through which the railway runs
c. the train itself
d. ™ the London underground railway system
4. Electronics
a. another name for valve
5. Surfing the cylindrical passage formed when a wave breaks and the crest tips forward

tube

(hardware)
A CRT terminal. Never used in the mainstream sense of TV; real hackers don't watch TV, except for Loony Toons, Rocky & Bullwinkle, Trek Classic, the Simpsons, and the occasional cheesy old swashbuckler movie.

tube

(electronics)

tube

(jargon)
(IBM) To send a copy of something to someone else's terminal. "Tube me that note."
References in periodicals archive ?
Dim male model Derek Zoolander is stunned when his career goes down the tubes thanks to the arrival of an equally vacuous rival.
Skylines are of ten chipped to deliver outrageous power - trouble is, reliability goes down the tubes.
If you don't you will be held responsible when our economy goes down the tubes.