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 ?
So Patricia Hewitt won't be called to explain why she was so extravagantly praising Rover bosses, even as the company went down the tubes.
The plan to pump the water for blending and eventual sale went down the tubes when samples showed that quantities of iron, manganese, bacteria and sulfate in the water exceed state and federal limits.
Jimmy Quinn's hopes of a Reading revival went down the tubes as they lost 1-0.
One needn't look far for examples of other industrial workers who followed the same hard-line, money-for-misery path as their enterprise went down the tubes, letting the bosses worry about the consequences; in places like Pittsburgh, some of them are now out of jobs, longing for the old days.
Frasier went down the tubes when Daphne and Niles got together, so let's hope they keep bickering and teasing.
Spain repaired some of the damage to punters with a 1-0 defeat of Russia but scorer Juan Carlos Valeron wasn't even a starter so loads of plunges on Raul and Fernando Morientes went down the tubes.