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Noun: 1. Named for Wilhelm Roentgen, a German professor of physics. How to say roentgen. Definition of roentgen ray in the Definitions.net dictionary. I fell down while I am pregnant and was sent to the ER. Roentgen, Wilhelm: Wilhelm Conrad Rontgen (1845-1923), German-born, Dutch-educated physicist who first observed and documented X-rays on November 8, 1895. x-ray (eks'rā), 1. (Research And Technology), Radio waves can flag very small breast tumors. How to pronounce roentgen. There will be an annual research award – Roentgen Resident/Fellow Research Award. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Please tell us where you read or heard it (including the quote, if possible). When he saw that he could film his thumb and forefinger and their bones on a screen, the story goes that he replaced the screen with a … All Free. 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. 1. Enrich your vocabulary with the English Definition dictionary 2. Test Your Knowledge - and learn some interesting things along the way. (Investigational Device), Ultrafast CT Scans: Sedation of Young Children Unnecessary, CT findings flag perforation in appendicitis (Retrospective, Case-Control Study), Renal Transplant Recipients on Cyclosporin A Develop Breast Masses, When Mammography Is Equivocal, US Is Critical, VCUG Not Required for Mild Hydronephrosis, Ultrasound Accurately Classifies Breast Masses in Girls, Roentgen Single-plane Stereophotogrammetric Analysis. Roentgen - WordReference English dictionary, questions, discussion and forums. roentgen [rent´gen] the international unit of x- or γ-radiation; it is the quantity of x- or γ-radiation such that the associated corpuscular emission per 0.001293 g of air produces, in air, ions carrying 1 electrostatic unit of electrical charge of either sign. Roentgen ray in American English. Meaning of roentgen ray. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Most material © 2005, 1997, 1991 by Penguin Random House LLC. roentgen ray definition in English dictionary, roentgen ray meaning, synonyms, see also 'Roentgen',roentgen equivalent man',roentgeno-',roentgenise'. Accessed 1 Jan. 2021. He was surprised to find a flickering image cast by his instruments separated from them by some distance. 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) gen (rĕnt'gĕn), Wilhelm K., German physicist and Nobel laureate, 1845-1923. 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. He made this seminal discovery by accident while experimenting with a set of cathode ray instruments. : 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 … What does roentgen ray mean? The distinction between X-rays and gamma rays is not so simple and has changed in recent decades. Synonym(s): roentgen ray Compare: glass rays, indirect rays. Named for Wilhelm Roentgen, a German professor of physics.Roentgen wanted to prove his hypothesis that cathode rays could penetrate substances besides air. Is an X- Ray dangerous to my fetus? 1 : any of the electromagnetic radiations that have an extremely short wavelength of less than 100 angstroms and have the properties of penetrating various thicknesses of all solids, of producing … What made you want to look up roentgen? Synonym (s): roentgen ray Compare: glass rays, indirect rays. Medical Definition of roentgen (Entry 2 of 2), Britannica.com: Encyclopedia article about roentgen. Roentgen definition in English dictionary, Roentgen meaning, synonyms, see also 'roentgen ray',roentgen equivalent man',roentgeno-',roentgenise'. Modified entries © 2019 by Penguin Random House LLC and … noun. A photon of electromagnetic radiation of very short wavelength, ranging from about 10 down to 0.01 nanometers, and very high energy, ranging from about 100 up to 100,000 electron volts. 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. Post the Definition of roentgen to Facebook, Share the Definition of roentgen on Twitter. 1. a. Roentgen, Wilhelm: Wilhelm Conrad Rontgen (1845-1923), German-born, Dutch-educated physicist who first observed and documented X-rays on November 8, 1895. 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… roentgen. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays. According to the currently valid definition, X-rays are emitted by electrons outside the nucleus, while gamma rays are emitted by the nucleus . International Scientific Vocabulary, from Wilhelm Röntgen. It is named after the German physicist Wilhelm Röntgen, the man who discovered X-rays. He's making a quiz, and checking it twice... Test your knowledge of the words of the year. The roentgen equivalent man (or rem) is a CGS unit of equivalent dose, effective dose, and committed dose, which are measures of the health effect of low levels of ionizing radiation on the human body. The roentgen has its roots in the Villard unit defined in 1908 by the American Roentgen Ray Society as "the quantity of radiation which liberates by ionisation one esu of electricity per cm of air under normal conditions of temperature and pressure." I was given an x- ray there, is the radiation dangerous to my fetus? Originating in 1908, this unit has been redefined and renamed over the years. Roentgen wanted to prove his hypothesis that cathode rays could penetrate substances besides air. He made this seminal discovery by accident while experimenting with a set of cathode ray instruments. Roentgenogram, also called roentgenograph or X-ray image, photograph of internal structures that is made by passing X-rays through the body to produce a shadow image on specially sensitized film. Q. b. often x-rays or X-rays A narrow beam of such photons. or X-ray n. or x ray or X ray 1. a. 'Nip it in the butt' or 'Nip it in the bud'. …unit of gamma-ray exposure, the roentgen (R), is defined in terms of the amount of ionization charge created per unit mass of air. Medical Definition of Roentgen ray. roentgen ray A stream of such photons used for their penetrating power in radiography, radiology, … Roentgen ray: Term coined around 1890 that preceded X-ray and is now synonymous with it. It doesn’t require balancing a ball on your nose. noun. roentgen ray - electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target X ray , X-radiation , X-ray ionizing radiation - high-energy radiation capable of producing ionization in substances through which it passes Listen to the audio pronunciation in the Cambridge English Dictionary. Can you spell these 10 commonly misspelled words? 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 … (sometimes lc) x-ray. [After Wilhelm Conrad Roentgen.] Learn a new word every day. Roentgen ray: Term coined around 1890 that preceded X-ray and is now synonymous with it. Enrich your vocabulary with the English Definition dictionary The unit is still used in the United States Navy nuclear propulsion program. Information and translations of roentgen ray in the most comprehensive dictionary definitions resource on the web. 'All Intensive Purposes' or 'All Intents and Purposes'? Using 1 esu ≈ 3.33564×10 C and the air density of ~1.293 kg/m³ at 0 °C and 101 kPa, this converts to 2.58 × 10 C/kg, which is the modern value given by NIST. Learn more. Roentgen Rays synonyms, Roentgen Rays pronunciation, Roentgen Rays translation, English dictionary definition of Roentgen Rays. Delivered to your inbox! The roentgen is a legacy unit of measurement for the kerma of X-rays and gamma rays up to 3 MeV. A type of irradiation used for imaging purposes that uses energy beams of very short wavelengths (0.1 to 1000 angstroms) that can penetrate most substances except heavy metals. A relatively high-energy photon with wavelength in the approximate range from 0.01 to 10 nanometers. A unit of radiation exposure equal to the quantity of ionizing radiation that will produce one electrostatic unit of electricity in one cubic centimeter of dry air at 0°C and standard atmospheric pressure. ARRS: American Roentgen Ray Society, 44211 SlatestoneCourt, Leesburg, VA 20176-5109, phone: (703) 729-3353 or(800) 438-2777, website: www.arrs.org.. 1. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. “Roentgen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/roentgen. 2. Roentgenometry definition is - measurement of X rays especially of their dosage for therapeutic purposes. 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 S ): roentgen ray in the United States Navy nuclear propulsion program their. 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