Ray

DEFINITION

A thin line or narrow beam of light, or a representation of such a straight line. A structure or part having the form of a straight line extending from a point; and when there are several such lines extending from one point, they may be said to radiate from that point, as points radiate from a star.Also see actino-, circle, girandole, incident light, light, radial balance, radius, reflection, refraction, and surface.