Radiant

Definition of Radiant

Ra´di`ant   Pronunciation: rā´dĭ`ant
a.1.Emitting or proceeding as from a center; resembling rays; radiating; radiate.
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.) Giving off rays; - said of a bearing; as, the sun radiant; a crown radiant.
5.(Bot.) Having a raylike appearance, as the large marginal flowers of certain umbelliferous plants; - said also of the cluster which has such marginal flowers.
6.(Physics) Emitted or transmitted by radiation; as, a radiant energy; radiant heat.
Radiant energy
(Physics) energy given out or transmitted by radiation, as in the case of light and radiant heat.
Radiant heat
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.
n.1.(Opt.) The luminous point or object from which light emanates; also, a body radiating light brightly.
2.(Geom.) A straight line proceeding from a given point, or fixed pole, about which it is conceived to revolve.
3.(Astron.) The point in the heavens at which the apparent paths of shooting stars meet, when traced backward, or whence they appear to radiate.

Related Words

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