2. Especially, emitting or darting rays of light or heat; issuing in beams or rays; beaming with brightness; emitting a vivid light or splendor; as, the radiant sun. Mark what radiant state she spreads. Milton.
3. Beaming with vivacity and happiness; as, a radiant face.
4. (Her.)
Defn: Giving off rays; — said of a bearing; as, the sun radiant; a crown radiant.
5. (Bot.)
Defn: Having a raylike appearance, as the large marginal flowers of certain umbelliferous plants; — said also of the cluster which has such marginal flowers. Radiant energy (Physics), energy given out or transmitted by radiation, as in the case of light and radiant heat. — Radiant heat, proceeding in right lines, or directly from the heated body, after the manner of light, in distinction from heat conducted or carried by intervening media. — Radiant point. (Astron.) See Radiant, n., 3.
RADIANT
Ra"di*ant, n.
1. (Opt.)
Defn: The luminous point or object from which light emanates; also, a body radiating light brightly.
2. (Geom.)