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.

A radiograph: a photograph made with X-rays.

An X-ray machine.

(chess) A tactical motif where a piece exerts influence or control over a square, piece, or line indirectly through another intervening piece.

Alternative letter-case form of X-ray. [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.

(transitive, chess) Of a piece, to exert indirect influence, by either attacking, defending, or controlling an opponent's or friendly piece through an intervening piece along a rank, file, or diagonal.

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

Of or relating to X-rays.