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Roentgen ray

noun

  1. (sometimes lowercase) x-ray.

roentgen ray

noun

  1. a former name for X-ray
“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
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Word History and Origins

Origin of Roentgen ray1

First recorded in 1895–1900

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roentgenotherapyRoerich

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