RADIANT

I. adjective Date: 15th century 1. radiating rays or reflecting beams of light, vividly bright and shining ; glowing, marked by or expressive of love, confidence, or happiness , 3. emitted or transmitted by radiation, emitting or relating to ~ heat, see: bright ~ly adverb II. noun Date: circa 1741 something that radiates: as, a point in the heavens at which the visible paths of meteors appear to meet when traced backward, the part of a gas or electric heater that becomes incandescent