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rontgen

 - 12 dictionary results

Rönt⋅gen

[rent-guhn, -juhn, ruhnt-; Ger. rœnt-guhn; Du. roont-khuhn]
–noun
1. Ju⋅li⋅us [yoo-lee-uhs] , 1855–1932, Dutch pianist, conductor, and composer; born in Germany.
2. Wil⋅helm Kon⋅rad [wil-helm kon-rad; Ger. vil-helm kawn-raht] . Roentgen, Wilhelm Konrad.

Roent⋅gen

[rent-guhn, -juhn, ruhnt-; for 1 also Ger. rœnt-guhn]
–noun
1. Wil⋅helm Kon⋅rad [wil-helm kon-rad; Ger. vil-helm kawn-raht] , 1845–1923, German physicist: discoverer of x-rays 1895; Nobel prize 1901.
2. (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
3. (sometimes lowercase) of or pertaining to Wilhelm Roentgen, the Roentgen unit, or esp. to x-rays.
Also, Röntgen.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To rontgen
roent·gen also rönt·gen   (rěnt'gən, -jən, rŭnt'-)   
n.   Abbr. R or r
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.

[After Wilhelm Konrad Roentgen.]
roent'gen adj.
Roent·gen   (rěnt'gən, -jən, rŭnt'-)   
German physicist who discovered x-rays and developed x-ray photography, revolutionizing medical diagnosis. He won a 1901 Nobel Prize.
rönt·gen   (rěnt'gən, -jən, rŭnt'-)   
n.  Variant of roentgen.
Rönt·gen   (rɶnt'gən)   
See Wilhelm Konrad Roentgen.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

roentgen 
1896, in Roentgen rays "X-rays," in allusion to Ger. 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 Fr. in 1921.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: 2roentgen
Variant: also röntgen
Function: noun
: the international unit of x-radiation or gamma radiation equal to theamount of radiation that produces in one cubic centimeter of dry air at 0°C (32°F) and standard atmospheric pressure ionization of either sign equal to one electrostatic unit of charge

Main Entry: röntgen
variant of ROENTGEN
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

Roentgen Roent·gen (rěnt'gən, -jən, rŭnt'-) or Rönt·gen (rɶnt'gən), Wilhelm Konrad. 1845-1923.

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

röntgen rönt·gen (rěnt'gən, -jən, rŭnt'-)
n.
Variant of roentgen.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
Roentgen   (rěnt'gən, rěnt'jən)  Pronunciation Key 
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 © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
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