1. roentgen ray, short-wave electromagnetic radiation able to penetrate solids; photograph created by means of x-rays (usually for medical purposes). 2. take an x-ray of something or somebody; "The doctor x-rayed my chest" examine by taking x-rays. 3. 1. X-rays are a type of radiation that can pass through most solid materials. X-rays are used by doctors to examine the bones or organs inside your body and are also used at airports to see: inside people's luggage. 4. An X-ray is a picture made by sending X-rays through something, usually someone's body. She was advised to have an abdominal X-ray. 5. If someone or something is X-rayed, an X-ray picture is taken of them. All hand baggage would be x-rayed They took my pulse, took my blood pressure, and X-rayed my jaw. to photograph the inside of someone's body using X-rays.
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