(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).

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

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

(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.

attributive form of gamma ray

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

Any of a class of large, circular stone disks, carved out of limestone, in the island of Yap, Micronesia

plural of rai stone

Any of a group of cartilaginous fishes in the family Myliobatidae, consisting mostly of large species living in the open ocean rather than on the sea bottom.

A European skate, Amblyraja radiata, with stellate bases on the dorsal spines.