roentgen ray

noun

often capitalized 1st R
: x-ray

Word History

First Known Use

circa 1890, in the meaning defined above

Time Traveler
The first known use of roentgen ray was circa 1890

Dictionary Entries Near roentgen ray

roentgenoscope

roentgen ray

roentgen-ray tube

See More Nearby Entries 

Cite this Entry

“Roentgen ray.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/roentgen%20ray. Accessed 8 Nov. 2024.

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Kids Definition

roentgen ray

noun
often capitalized 1st R
: x-ray

Medical Definition

roentgen ray

noun
: x-ray sense 1
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