
1) English invention 2) Luggage-scanning technology
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https://www.crosswordclues.com/clue/x-ray-tube

A cathode ray tube that focuses energetic streams of electrons on a metal target, causing the metal to emit x-rays.
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http://antoine.frostburg.edu/chem/senese/101/glossary/x.shtml

An X-ray tube is a vacuum tube that produces X-rays. They are used in X-ray generators. X-rays are part of the electromagnetic spectrum, an ionizing radiation with wavelengths shorter than ultraviolet light. X-ray tubes evolved from experimental Crookes tubes with which X-rays were first discovered in the late 19th century, by Wilhelm Röntgen and...
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http://en.wikipedia.org/wiki/X-ray_tube

• A vacuum tube suitable for producing Rontgen rays.
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http://thinkexist.com/dictionary/meaning/x-ray_tube/

evacuated electron tube that produces X rays by accelerating electrons to a high velocity with a high-voltage field and causing them to collide with ... [3 related articles]
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http://www.britannica.com/eb/a-z/x/1

A vacuum tube containing electrodes that accelerates electrons and directs them to a metal anode, where their impacts produce X-rays.
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http://www.daviddarling.info/encyclopedia/X/X-ray_tube.html

an evacuated tubular structure with two or more electrodes that are insulated from each other: a cathode from which electrons are emitted; an anode at which the deceleration of the electrons causes the emission of X-radiation and, in some cases, one or more pierced electrodes between the cathode and anode to accelerate, to focus, or to control the ...
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http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=881-05-21
X'-ray' tube (Physics) A vacuum tube suitable for producing Röntgen rays.
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http://www.encyclo.co.uk/webster/X/2

Type: Term See: x-ray
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http://www.medilexicon.com/medicaldictionary.php?t=94438

a glass vacuum bulb containing two electrodes; electrons are obtained either from gas in the tube or from a heated cathode. When suitable potential is applied, electrons travel at high velocity from cathode to anode, where they are suddenly arrested, giving rise to x-rays. Standard s...
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http://www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszS

[
n] - a vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays
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http://www.webdictionary.co.uk/definition.php?query=X-ray%20tube

A cathode ray tube that focuses energetic streams of electrons on a metal target, causing the metal to emit x-rays. See also: Electron.
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https://www.encyclo.co.uk/local/20687
noun a vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays
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https://www.encyclo.co.uk/local/20974
No exact match found.