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. 2022

How to use Roentgen in a sentence

But nothing less than the Roentgen ray would have revealed the young man, who was stealthily watching the ferocious buck.
Two Boys in Wyoming|Edward S. Ellis
Nothing could more vividly bear out this gentleman than contemplation of the possibilities of the Roentgen ray.
Peeps at People|Robert Cortes Holliday
He discovered that sound-vibrations rule the universe, that they may be turned into a musical Roentgen ray.
Melomaniacs|James Huneker
I must tell you of my own experiences in connection with these X-rays, which I hear some men describe also as Roentgen rays.
Autobiography of an Electron|Charles R. (Charles Robert) Gibson

When the flying electrons strike upon a little metal target placed in their path, they produce the well-known Roentgen rays.
Autobiography of an Electron|Charles R. (Charles Robert) Gibson

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 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for Roentgen (1 of 2)

roentgen

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′- ]

Wilhelm Konrad 1845-1923

German physicist who discovered x-rays and developed x-ray photography, revolutionizing medical diagnosis. He won a 1901 Nobel Prize.

Scientific definitions for Roentgen

Roentgen

[ rĕnt′gən, rĕnt′jən ]

Wilhelm Konrad 1845-1923

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.