Roentgen
[ rent-guhn, -juhn, ruhnt-; for 1 also German rœnt-guhn ]
/ ˈrɛnt gən, -dʒən, ˈrʌnt-; for 1 also German ˈrœnt gən /
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noun
Wil·helm Kon·rad [wil-helm -kon-rad; German vil-helm -kawn-raht], /ˈwɪl hɛlm ˈkɒn ræd; German ˈvɪl hɛlm ˈkɔn rɑt/, 1845–1923, German physicist: discoverer of x-rays 1895; Nobel prize 1901.
(lowercase)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. Abbreviation: r, R
adjective
(sometimes lowercase) of or relating to Wilhelm Roentgen, the Roentgen unit, or especially to x-rays.
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Also Röntgen.
Words nearby Roentgen
Roebling, roebuck, roe deer, Roeg, roemer, Roentgen, roentgen equivalent man, roentgenism, roentgenium, roentgenize, roentgeno-
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
How to use Roentgen in a sentence
British Dictionary definitions for Roentgen (1 of 2)
roentgen
rntgen
/ (ˈrɒntɡən, -tjən, ˈrɛnt-) /
noun
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 air of mass one kilogram are stopped completelySymbol: R, r
Word Origin for roentgen
C20: named after W. K. Roentgen
British Dictionary definitions for Roentgen (2 of 2)
Roentgen
Rntgen
/ (ˈrɒntɡən, -tjən, ˈrɛnt-, German ˈrœntɡən) /
noun
Wilhelm Konrad (ˈvɪlhɛlm ˈkɔnraːt). 1845–1923, German physicist, who in 1895 discovered X-rays: Nobel prize for physics 1901
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Medical definitions for Roentgen (1 of 2)
roentgen
n.
A unit of radiation exposure that is 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.
Medical definitions for Roentgen (2 of 2)
Roentgen
[ rĕnt′gən, -jən, rŭnt′- ]
German physicist who discovered x-rays and developed x-ray photography, revolutionizing medical diagnosis. He won a 1901 Nobel Prize.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Scientific definitions for Roentgen
Roentgen
[ rĕnt′gən, rĕnt′jən ]
German physicist who discovered x-rays in 1895 and went on to develop x-ray photography, which revolutionized medical diagnosis. In 1901 he was awarded the Nobel Prize for physics.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.