- 1. The ionizing electromagnetic radiation emitted from a highly evacuated tube, resulting from the excitation of the inner orbital electrons by the bombardment of the target anode with a stream of electrons from a heated cathode. SYN: roentgen ray. Cf.:glass rays, under ray, indirect rays, under ray. 2. Ionizing electromagnetic radiation produced by the excitation of the inner orbital electrons of an atom by other processes, such as nuclear delay and its sequelae. 3. SYN: radiograph.
* * *X-ray n1) any of the electromagnetic radiations of the same nature as visible radiation but of an extremely short wavelength less than 100 angstroms that is produced by bombarding a metallic target with fast electrons in vacuum or by transition of atoms to lower energy states and that has the properties of ionizing a gas upon passage through it, of penetrating various thicknesses of all solids, of producing secondary radiations by impinging on material bodies, of acting on photographic films and plates as light does, and of causing fluorescent screens to emit light called also roentgen ray2) a photograph obtained by use of X-rays <a chest X-ray>X-ray adj
* * *(eksґra) see under ray.
Medical dictionary. 2011.
Look at other dictionaries:
Ray Reach — Reach (right) with Branford Marsalis. (Photo by Claudia Reach.) Background information Birth name Raymond Everett Reach, Jr … Wikipedia
Ray Allen — Fiche d’identité … Wikipédia en Français
Ray Bradbury — Born August 22, 1920 (1920 08 22) (age 91) Nationality American … Wikipedia
Ray (optics) — Ray of light redirects here. For other uses, see Ray of light (disambiguation). In optics, a ray is an idealized narrow beam of light. Rays are used to model the propagation of light through an optical system, by dividing the real light field up… … Wikipedia
Ray (surname) — Ray is a common surname in India, and is also found in many English speaking countries. In India, the same name is also sometimes spelled Roy, and comes from the same root as Raj, which is also the root of the Latin rex (king), English reign and… … Wikipedia
RAY — steht für: Ray (Persien), auch Rayy, eine Industriestadt in Iran Ray (North Dakota), USA Ray (Arizona) Ray sur Saône, Gemeinde im französischen Département Haute Saône beim Bookcrossing die Abkürzung für einen Bookray ein österreichisches… … Deutsch Wikipedia
Ray Charles — bei seinem letzten Auftritt auf dem Festival International de Jazz de Montréal 2003 Ray Charles (* 23. September 1930 als Raymond Charles Robinson in Albany, Georgia; † 10. Juni 2004 in Beverly Hills, Kalifornien) war ein … Deutsch Wikipedia
Ray of light (canción) — Saltar a navegación, búsqueda «Ray of light» Sencillo de Madonna d … Wikipedia Español
Ray (Familienname) — Ray ist ein Familienname. Bekannte Namensträger Inhaltsverzeichnis A B C D E F G H I J K L M N O P Q R S T U V W X Y Z … Deutsch Wikipedia
Ray Rayner — with Chelveston and Cuddly Dudley on Ray Rayner and His Friends. Birth name Raymond M. Rahner Born July 23, 1919(1919 07 23) Queens, New … Wikipedia
Ray Gun (magazine) — Ray Gun was an American alternative rock and roll magazine, first published in 1992 in Santa Monica, California. Led by founding art director David Carson, Ray Gun explored experimental magazine typographic design. The result was a chaotic,… … Wikipedia