Roentgen

Roentgen
/rent"geuhn, -jeuhn, runt"-/; for 1 also Ger. /rdduent"geuhn/, n.
1. Wilhelm Konrad /wil"helm kon"rad/; Ger. /vil"helm kawn"rddaht/, 1845-1923, German physicist: discoverer of x-rays 1895; Nobel prize 1901.
2. (l.c.) Physics. a unit of exposure dose that measures x-rays or gamma rays in terms of the ions or electrons produced in dry air at 0° C and one atmosphere, equal to the amount of radiation producing one electrostatic unit of positive or negative charge per cubic centimeter of air. Abbr.: r, R
adj.
3. (sometimes l.c.) of or pertaining to Wilhelm Roentgen, the Roentgen unit, or esp. to x-rays.
Also, Röntgen.

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▪ unit of radiation
      unit of X-radiation (X-ray) or gamma radiation (gamma ray), the amount that will produce, under normal conditions of pressure, temperature, and humidity, in 1 kg (2.2 lbs) of air, an amount of positive or negative ionization equal to 2.58 × 10−4 coulomb. It is named for the German physicist Wilhelm Conrad Röntgen (Röntgen, Wilhelm Conrad). See also rem.

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Universalium. 2010.

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  • Roentgen — (Wilhelm Conrad). V. Röntgen. Roentgen n. m., roentgenthérapie n. f. V. röntgen, röntgenthérapie. ⇒ROENTGEN, RÖNTGEN, subst. masc. PHYS. Unité de quantité de radiation (X ou ) produisant dans l air des ions porteurs d une quantité d électricité… …   Encyclopédie Universelle

  • roentgen — (Wilhelm Conrad). V. Röntgen. Roentgen n. m., roentgenthérapie n. f. V. röntgen, röntgenthérapie. ⇒ROENTGEN, RÖNTGEN, subst. masc. PHYS. Unité de quantité de radiation (X ou ) produisant dans l air des ions porteurs d une quantité d électricité… …   Encyclopédie Universelle

  • ROENTGEN (D.) — ROENTGEN DAVID (1743 1807) Fils d’Abraham Roentgen (1711 1792), ébéniste allemand installé à Neuwied près de Coblence. Formé par son père, David Roentgen lui succède en 1772. Il donne une grande extension à l’atelier de Neuwied, dont la… …   Encyclopédie Universelle

  • Roentgen — Saltar a navegación, búsqueda Röntgen o Roentgen puede referirse a: Wilhelm Conrad Röntgen, físico alemán. Abraham Röntgen y David Röntgen, ebanistas alemanes. Julius Röntgen, compositor alemán. Röntgen, unidad de medida para la radiación… …   Wikipedia Español

  • roentgen — RÓENTGEN s.m. v. röntgen. Trimis de cornel, 13.09.2007. Sursa: DEX 98  ROENTGEN [pr.: röntghén] roentgeni m. fiz. Unitate de măsură pentru radiaţii. ♢ Aparat roentgen aparat folosit în medicină pentru efectuarea roentgenoscopiei. [var. röntgen]… …   Dicționar Român

  • Roentgen —   [ rœ ], David, Kunsttischler, * Herrnhaag (heute zu Büdingen) 11. 8. 1743, ✝ Wiesbaden 12. 2. 1807; entwickelte die 1772 übernommene Werkstatt seines Vaters Abraham (* 1711, ✝ 1793) in Neuwied zu einem Unternehmen von internationalem Ruf. Seit… …   Universal-Lexikon

  • roentgen — (R) Cantidad de radiación X o gamma que crea una unidad electrostática de iones en 1 ml de aire a 0 ºC y 760 mm de presión. En radioterapia o radiodiagnóstico, el roentgen es la unidad de la dosis emitida …   Diccionario médico

  • roentgen — 1896, in Roentgen rays X rays, in recognition of German physicist Wilhem Conrad Röntgen (1845 1923), who discovered X rays in 1895. As a unit of exposure to radiation, it is attested from 1922, proposed in French in 1921 …   Etymology dictionary

  • roentgen — (De W. C. von Roentgen, 1845 1923, físico alemán descubridor de los rayos X). m. Fís. y Med. Unidad electrostática cegesimal de poder ionizante con relación al aire. Se emplea en las aplicaciones terapéuticas de los rayos X …   Diccionario de la lengua española

  • roentgen — [rent′gən, ren′chən] n. [after ROENTGEN Wilhelm Konrad] a basic unit of exposure to X rays, gamma rays, or other ionizing radiation, equal to the amount of radiation that will produce an electric charge of 0.000258 coulomb per kilogram of dry air …   English World dictionary

  • Roentgen — Roentgen. См. рентген. (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.

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