tube

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Related to going down the tubes: gone down the tubes, went down the tube

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 ?
After all, if the banks are going to fail, the credit card companies are going down the tubes and the IRS won't be able to collect taxes, then it's definitely time to let the good times roll.
But Greg Hands jetting off on holiday while the new devolution deal is going down the tubes is still completely gobsmacking.
Speaking yesterday, Curley, who intends to continue living in Newmarket, said: "Racing is just going down the tubes every day in terms of prize-money, and I have just come to the stage where I have had enough of it.
I hope someone down Cardiff Bay will get off their backsides and stop yet another manufacturing plant going down the tubes.
They spent so much time and effort trying to be great parents, and they saw their son going down the tubes.
In fact it could have helped stop the Yard going down the tubes.
GOING down the tubes is usually a terminal experience for most companies - but at D.
A small family-run business is going down the tubes, thousands of pounds of investment seem to have been wasted and father and son blame each other.
They forget that taxes paid by ordinary people are what saved them from going down the tubes.