(electricity) A ray consisting of a stream of electrons in a vacuum tube, that are emitted by the cathode and accelerated towards the anode by an electric field.

plural of starry ray

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

A program or algorithm for ray tracing.

plural of ray tracer

plural of ray gun

(dated) One of the rays that emanate from the outer surface of a plate composed of any material permeable by cathode rays, such as aluminium, which forms a portion of a wall of a vacuum tube, or which is mounted within the tube and exposed to radiation from the cathode.

plural of Lenard ray

(physics, obsolete) infrared ray, heat ray

plural of calorific ray