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| Date: | 1800-1900 |
| Origin: | Translation of German X-strahl, X representing 'unknown' |
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X-ray1
[countable]
[countable]1MH a beam of radiation (1) that can go through solid objects and is used for photographing the inside of the body
2MH a photograph of part of someone's body, taken using X-rays to see if anything is wrong : 
The X-ray showed that her leg was not broken.
The X-ray showed that her leg was not broken.3MH a medical examination made using X-rays : I had to go to hospital for an X-ray. a chest X-ray
I had to go to hospital for an X-ray.a chest X-ray
