x-radiation

noun

x-ra·​di·​a·​tion ˌeks-ˌrā-dē-ˈā-shən 

often capitalized

1

: exposure to X-rays

2

: radiation composed of X-rays

Word History

First Known Use

1896, in the meaning defined at sense 1

Medical Definition

x-radiation

noun

x-ra·​di·​a·​tion

often capitalized X

1

: exposure to X-rays

2

: radiation composed of X-rays