roentgen therapy
/ˈrʌntjən ˌθɛrəpi/ /ˈrʌntɡən ˌθɛrəpi/(also rontgen therapy, röntgen therapy) Medicine
noun
The therapeutic use of X-rays; radiotherapy; radiation therapy.
Origin
Early 20th century; earliest use found in Journal of the American Medical Association. From Roentgen + therapy, probably after German Röntgentherapie; compare French röntgenthérapie.