plural of beta ray

plural of anticrepuscular ray

A meteorological optical phenomenon similar to a crepuscular ray, but appearing opposite the Sun in the sky.

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.

Of or having to do with X-rays.

Very high frequency (and therefore very high energy) electromagnetic radiation emitted as a consequence of radioactivity.

Any of several very large pelagic rays formerly of the genus Manta, now placed in genus Mobula, with winglike pectoral fins, a long tail, and two fins resembling horns that project from the head.

A sunbeam seen just after sunset or just before sunrise, caused by a cloud below the horizon and dust particles in the air above the horizon. / A cloud shadow cast on the bright sky.

(optics) A ray that passes through the axis of the optical fiber.