Of light: issuing or appearing in the form of rays; shining, splendid, dazzling. Also figurative (of beauty, qualities, etc.): shining or projected…

Of light, beams, etc.: issuing as rays. Also: of or relating to light in the form of rays. Obsolete.

Optics. Consisting of rays of light. Obsolete.

Of the nature of, having the appearance of, or issuing in, a stream. Also, emitting streams (of light).

like a beam, of timber or of light.

= actinomorphic, adj.