tube(redirected from Ewald 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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A long, hollow cylinder, or other hollow shape; typically a flexible or thin-walled metal cylinder, as opposed to a pipe.
A narrow channel within the body of an animal or plant.
A long cylindrical body with a hollow center used especially to convey fluid.
A passage in a cave having smooth sides and an elliptical to nearly circular cross section.
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.
1. A thin-walled pipe.
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
5. Surfing the cylindrical passage formed when a wave breaks and the crest tips forward
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.
(IBM) To send a copy of something to someone else's terminal. "Tube me that note."