Meaning of roentgen ray. 1. It doesn’t require balancing a ball on your nose. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays. Named for Wilhelm Roentgen, a German professor of physics. Modified entries © 2019 by Penguin Random House LLC and … a unit of dose of electromagnetic radiation equal to the dose that will produce in air a charge of 0.258 × 10 –3 coulomb on all ions of one sign, when all the electrons of both signs liberated in a volume of … Most material © 2005, 1997, 1991 by Penguin Random House LLC. Roentgen, Wilhelm: Wilhelm Conrad Rontgen (1845-1923), German-born, Dutch-educated physicist who first observed and documented X-rays on November 8, 1895. Roentgen ray: Term coined around 1890 that preceded X-ray and is now synonymous with it. Wilhelm Conrad Röntgen was a German mechanical engineer and physicist, who, on 8 November 1895, produced and detected electromagnetic radiation in a wavelength range known as X-rays or Röntgen rays, an achievement that earned him the first Nobel Prize in Physics in 1901. Because of the close connection of the signal produced in an ion chamber with this definition, a measurement of the ion current under proper conditions can give… Please tell us where you read or heard it (including the quote, if possible). In honour of his accomplishments, in 2004 the International Union of Pure and Applied Chemistry (IUPAC) named element 111, roentgenium, a radioactive element with multiple unstable isotopes, after him. 1. a. Roentgen ray in American English. Roentgenometry definition is - measurement of X rays especially of their dosage for therapeutic purposes. 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. Rontgen - German physicist who discovered x-rays and developed roentgenography (1845-1923) International Scientific Vocabulary, from Wilhelm Röntgen. Listen to the audio pronunciation in the Cambridge English Dictionary. Delivered to your inbox! : the international unit of x-radiation or gamma radiation equal to the amount of radiation that produces in one cubic centimeter of dry air at 0°C and standard atmospheric pressure ionization of … 2. https://medical-dictionary.thefreedictionary.com/roentgen+ray, Nandalur presented the study findings in May at the annual meeting of the American, Compared with conventional technology, digital chest radiographs can reduce the amount of radiation patients receive by 66% or more with no reduction in image quality, according to a study presented at the American, Allan Maimed said in a poster session at the annual meeting of the, Allan Malmed said in a poster session at the annual meeting of the, Statler, MC, USA, noted in his presentation at the annual meeting of the American, Muttarak said at the annual meeting of the American, O'Reilly urged at the annual meeting of the American, Andrea Arjonilla said at the annual meeting of the American, WASHINGTON -- Ultrasound assessment correctly classifies more than 90% of palpable breast masses in girls as normal tissue, cysts, abscesses, or solid masses, Kyung-Hwa Rhee reported at the annual meeting of the American, Theodorou said at the annual meeting of the, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, Positioning is key to cancer detection. 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 Enrich your vocabulary with the English Definition dictionary Roentgen, Wilhelm: Wilhelm Conrad Rontgen (1845-1923), German-born, Dutch-educated physicist who first observed and documented X-rays on November 8, 1895. 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