1926, in the meaning defined above
X-ray star
X-ray therapy
X-ray tube
“X-ray therapy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/X-ray%20therapy. Accessed 19 Aug. 2024.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
See Definitions and Examples »
Get Word of the Day daily email!
Share