Of or having to do with X-rays.

Short wavelength electromagnetic radiation usually produced by bombarding a metal target in a vacuum. Used to create images of the internal structure of objects; this is possible because X-rays pass through most objects and can expose photographic film.

(transitive, informal) To take a radiograph of; to obtain an image of using X-ray radiation, especially for the purpose of medical diagnostic evaluation.

A stream of alpha particles.

(science fiction) A fictional beam of radiation that can kill.

(science fiction) A fictional weapon that emits harmful rays.

Alternative spelling of gamma ray

Rhinoptera bonasus, an eagle ray found throughout a large part of the western Atlantic and Caribbean.

(geometry) A ray, or half-line.

A discredited hypothetical form of radiation described in 1903.