A ray (fish) of the family Gymnuridae (or, in some systems, the subfamily Gymnurinae).

(physics) An electron ejected by recoil when a rapidly moving alpha particle or other charged particle passes through matter.

(of fish) In the Actinopterygii taxonomic class of fish, all having in common lepidotrichia (a kind of fin made of webs of skin supported by bony or horny spines).

(computer graphics) A technique that produces realistically shaded images by projecting imaginary light rays to determine which parts of an object should be illuminated.

attributive form of gamma ray

(computer graphics) The calculation of intersections between a ray and a surface.

(physics) A path a photon or a group of photons takes through space, visible as a column of light. / (idiomatic) An inspiring or enlightening person or thing.

Any of the group of rays of the order Torpedodiniformes, which can produce an electric discharge.

(obsolete) X-ray

Alternative spelling of X-ray