X-radiation

名词 x-radiation:

1. electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target
   同义词：X ray, X-ray, roentgen ray
2. obtaining images by the use of X rays
   同义词：X-raying

x-ra.di.a.tion

n.（名词）
Treatment with or exposure to x-rays.
X射线治疗，X辐射
Radiation composed of x-rays.
X射线：由X射线组成的射线