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Webster 1913 Edition

Radiant

Ra′di-ant

(rā′dĭ-ant)
,
Adj.
[L.
radians
,
-antis
, p. pr. of
radiare
to emit rays or beams, fr.
radius
ray: cf. F.
radiant
. See
Radius
,
Ray
a divergent line.]
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.
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
,
Noun.
, 3.

Ra′di-ant

,
Noun.
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.

Webster 1828 Edition

Radiant

RA'DIANT

,
Adj.
Shooting or darting rays of light; beaming with brightness; emitting a vivid light or splendor; as the radiant sun.
Mark what radiant state she spreads.
Radiant in glittering arms and beamy pride.

RA'DIANT

,
Noun.
In optics, the luminous point or object from which light emanates, that falls on a mirror or lens.

Definition 2024

radiant

radiant

English

Adjective

radiant ‎(comparative more radiant, superlative most radiant)

  1. Radiating light and/or heat.
    the radiant sun‎
  2. Emitted as radiation.
  3. Beaming with vivacity and happiness.
    a radiant face‎
    • 1907, Robert W[illiam] Chambers, “chapter I”, in The Younger Set (Project Gutenberg; EBook #14852), New York, N.Y.: A. L. Burt Company, published 1 February 2005 (Project Gutenberg version), OCLC 4241346:
      His sister, Mrs. Gerard, stood there in carriage gown and sables, radiant with surprise. “Phil !  You !  Exactly like you, Philip, to come strolling in from the antipodes—dear fellow !” recovering from the fraternal embrace and holding both lapels of his coat in her gloved hands.
  4. Emitting or proceeding as if from a center.
  5. (heraldry) Giving off rays; said of a bearing.
    the sun radiant;  a crown radiant‎
  6. (botany) Having a ray-like appearance, like the large marginal flowers of certain umbelliferous plants; said also of the cluster which has such marginal flowers.

Translations

Noun

radiant ‎(plural radiants)

  1. A point source from which radiation is emitted.
  2. (astronomy) The apparent origin, in the night sky, of a meteor shower.
  3. A straight line proceeding from a given point, or fixed pole, about which it is conceived to revolve.

Translations

Anagrams

French

Verb

radiant

  1. present participle of radier

Latin

Verb

radiant

  1. third-person plural present active indicative of radiō

Etymology

From Middle French radiant, from Latin radians, radiantis, present participle of radiare ‎(“to emit rays or beams”).

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