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WordNet-Online 
 Definitions from WordNet
Noun roentgen ray has 1 sense 
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| Definitions from the WebRoentgen RayDescriptionA Roentgen ray, named after Wilhelm Conrad Roentgen, who discovered it in 1895, refers to a stream of high-energy electromagnetic radiation. It is commonly known as an X-ray and is widely used in medical diagnosis and industrial applications. Sample Sentences
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