from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Short wavelength electromagnetic radiation usually produced by bombarding a metal target in a vacuum. Used to create images of the internal structure of objects; this is possible because X-rays pass through most objects and can expose photographic film.
  • n. A radiograph: a photograph made with X-rays.
  • n. An X-ray machine.
  • n. The letter X in the ICAO spelling alphabet.
  • v. To take a radiograph of; to obtain an image of using X-ray radiation, especially for the purpose of medical diagnostic evaluation.
  • adj. Of or having to do with X-rays.
  • n. The letter X in the ICAO spelling alphabet.

from the GNU version of the Collaborative International Dictionary of English

  • n. the Röntgen ray; -- so called by its discoverer because of its enigmatical character, x being an algebraic symbol for an unknown quantity.
  • n. originally, any of the rays produced when cathode rays strike upon surface of a solid (as a copper target or the wall of the vacuum tube); now defined as electromagnetic radiation with a wavelength of 0.1 to 10 nanometers. X-rays are noted for their penetration of many opaque substances, as wood and flesh, their action on photographic plates, and their fluorescent effects. They were called X rays by their discoverer, W. K. Röntgen, but were also referred to for some time as Roentgen rays. The term X-ray has become the most common designation. They also ionize gases, but cannot be reflected, or polarized, or deflected by a magnetic field. They are used in examining objects opaque to visible light, as for imaging bones or other structures inside the human body, and for detecting flaws in metal objects, such as in welds.
  • transitive v. to examine by means of X-rays; to irradiate with X-rays.

from The Century Dictionary and Cyclopedia

  • To take a radiograph of; apply X-rays to the study of (an object, such as a portion of the human body).
  • n. See ray.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a radiogram made by exposing photographic film to X rays; used in medical diagnosis
  • n. electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target
  • n. a radiogram made by exposing photographic film to X rays; used in medical diagnosis
  • n. electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target
  • v. take an x-ray of something or somebody
  • v. examine by taking x-rays


from Wiktionary, Creative Commons Attribution/Share-Alike License

Transliteration of German X-Strahl, coined by Wilhelm Conrad Röntgen upon his discovery of the rays in 1895, x signifying their unknown nature.


  • Using a technique called X-ray crystallography, which allows scientists to visualize almost every atom in a protein, this mutant proved very unusual:

    The Edge of Evolution

  • It had already begun to fill, so Richardson nodded his approval and told the nurse to call X-ray to send up a portable machine to make sure the blockage was gone.

    Coyote Medicine

  • The ID24 uses a technique known as X-ray absorption spectroscopy which determines the local geometric and electronic structure of matter by identifying which elements are present given their rates of absorbing X-rays.


  • "There is an evacuation zone, that means very few people are going to get doses even comparable to a chest X-ray, which is a pretty low radiation dose," Brenner added.

    Breaking News: CBS News

  • I review Harold’s chest X-ray, which is not perfect but still looks much better than the boy it represents.

    Between Expectations

  • “I’ll call X-ray,” said Maudeen, reaching once again for the phone.

    Life Support

  • A jazz-loving Soviet medical student discovered that he could inscribe sound grooves on the surface of X-ray plates, and invented a machine that allowed him to produce low-quality but sufficient copies of music recordings.

    A Renegade History of the United States

  • He listens carefully and stares as if examining my inside through some kind of X-ray view.

    The Bushman Way of Tracking God

  • Customs Service in February 2003 to the Chenega Technology Services Corp. The work is to maintain thousands of gamma-ray, X-ray and other scanning machines at the nation's ports and borders.

    A drumbeat of warnings about impropriety regarding Alaska native corporation contracts

  • Humana hopes the centers can provide an alternative to costly emergency-room care for its members: A typical visit to a Concentra urgent-care clinic costs $190 to $200, including an X-ray, according to the company, while a comparable ER visit would range from $350 to $650 or more, with additional services for X-rays.

    Reforms Prod Insurers to Diversify


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