roentgen ray

noun, often capitalized 1st R

Definition of roentgen ray

First Known Use of roentgen ray

circa 1890, in the meaning defined above

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The first known use of roentgen ray was circa 1890

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Cite this Entry

“Roentgen ray.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/roentgen%20ray. Accessed 21 Oct. 2020.

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roentgen ray

noun

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