a type of radiation that can go through many solid substances, allowing hidden objects such as bones and organs in the body to be photographedX射线，X光
B2 a photograph of a part of the body made using X-raysX光照片
an examination of a part of the body by taking and studying an X-ray photographX光检查
The tumour showed up on the X-ray.
I had to have an X-ray on my arm.