X rays
Rontgen ray R["o]ntgen ray, Roentgen ray Roentgen ray [see {R["o]ntgen}.] (Physics) An {X-ray}; originally, the term was applied to any of the rays produced when cathode rays strike upon surface of a solid (as the wall of the vacuum tube), but now it refers specifically to electromagnetic radiation having wavelengths from 10^{-3} nm to 10 nm, immediately below ultraviolet radiation on the wavelength scale. R["o]ntgen rays are noted for their penetration of 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. R["o]ntgen. They are one of the forms of ionizing radiation, which can have damaging effects on living cells. They also ionize gases, but cannot be reflected, or polarized, or deflected by a magnetic field. They are used in examining opaque objects, especially in medicine for visualizing organs and other objects inside the human body, as for locating fractures or bullets, and examining internal organs for abnormalities. [Webster 1913 Suppl. +PJC]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • X rays — X ray X ray, X ray X ray([e^]ks r[=a] ), n. [so called by its discoverer because of its enigmatical character, x being an algebraic symbol for an unknown quantity.] (Physics) originally, any of the rays produced when cathode rays strike upon… …   The Collaborative International Dictionary of English

  • X-rays — X rays. См. Рентгеновское излучение. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • X-Rays — (Roget s IV) n. 1. [Electromagnetic radiation] SYN. Roentgen Rays, radioactivity, radium emanation, actinic Rays, actinism, exradio, encephalogram, ultraviolet Rays, refractometry, radiant energy, cathode Rays; see also energy 3, ray . 2. [A… …   English dictionary for students

  • X-Rays — Röntgenstrahlung bezeichnet elektromagnetische Wellen einer Photonenenergie zwischen ungefähr 100 eV und 250 keV und von Wellenlängen zwischen 10 8 und 10 12 m. Röntgenstrahlen liegen im elektromagnetischen Spektrum zwischen dem ultravioletten… …   Deutsch Wikipedia

  • x-rays — roentgen rays * * * pl. n. electromagnetic radiation of extremely short wavelength (beyond the ultraviolet), which pass through matter to varying degrees depending on its density. X rays are produced when high energy beams of electrons strike… …   Medical dictionary

  • X-rays — pl. n. electromagnetic radiation of extremely short wavelength (beyond the ultraviolet), which pass through matter to varying degrees depending on its density. X rays are produced when high energy beams of electrons strike matter. They are… …   The new mediacal dictionary

  • X-rays — rentgeno spinduliuotė statusas T sritis Standartizacija ir metrologija apibrėžtis Elektromagnetinė jonizuojančioji spinduliuotė, kurios bangos ilgis nuo 10⁻¹⁴ m iki 10⁻⁷ m. atitikmenys: angl. Roentgen rays; X ray radiation; X rays vok.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • X-rays — rentgeno spinduliuotė statusas T sritis Standartizacija ir metrologija apibrėžtis Fotoninė spinduliuotė, sudaryta iš stabdomosios ir (arba) būdingosios spinduliuotės. atitikmenys: angl. Roentgen rays; X ray radiation; X rays vok. Röntgenstrahlung …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • X-Rays —    The Nazi used X rays for the purpose of sterilizing designated victims in the euthanasia centers. In Auschwitz, the prolonged exposure to X rays was used on women, without any protection, for the purpose of medical experiments by Dr. Josef… …   Historical dictionary of the Holocaust

  • X-rays — rentgeno spinduliuotė statusas T sritis radioelektronika atitikmenys: angl. Roentgen radiation; X radiation; X rays vok. Röntgenstrahlen, m; Röntgenstrahlung, f; X Strahlung, f rus. рентгеновские лучи, m; рентгеновское излучение, n pranc.… …   Radioelektronikos terminų žodynas

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