radiant

[rey-dee-uh nt] /ˈreɪ di ənt/
adjective
1.
emitting rays of light; shining; bright:
the radiant sun; radiant colors.
2.
bright with joy, hope, etc.:
radiant smiles; a radiant future.
3.
Physics. emitted or propagated by radiation.
4.
Heraldry.
  1. noting a partition line having a series of flamelike indentations formed by ogees joined in zigzags; rayonny.
  2. (of a charge, as an ordinary) having an edge or edges so formed.
noun
5.
a point or object from which rays proceed.
6.
Astronomy. the point in the heavens from which a shower of meteors appears to radiate.
7.
a refractory absorbing and radiating heat from the flames of a gas fireplace or the like.
Origin
1400-50; late Middle English < Latin radiant- (stem of radiāns, present participle of radiāre to radiate light, shine), equivalent to radi(us) beam, ray (see radius) + -ant- -ant
Related forms
radiantly, adverb
antiradiant, adjective
nonradiant, adjective
nonradiantly, adverb
superradiant, adjective
unradiant, adjective
Synonyms
1. beaming, refulgent, resplendent. See bright.
Antonyms
1. dim.
Examples from the web for radiant
  • Ask your builder to include a radiant barrier in the attic.
  • Solar-heated water circulates in a radiant-heat floor that is further warmed by winter sun.
  • Some of them can be seen on the walls of his radiant paintings of the period.
  • Energy precipitation in nature is circular in radiant.
  • Everything was under control and the future was radiant.
  • One can easily miss a radiant poem amid the many lackluster ones.
  • The central light ribbon in this image resembles the head and beak of a bird, flanked by a radiant wingspan.
  • Temperature and humidity sensors throughout the house control four heating and cooling systems, plus in-floor radiant heat.
  • For the writer, winter is a backdrop to perilous stories of birth and the radiant exhaustion of new motherhood.
  • When you remove the mask, your face will look fresh and radiant.
British Dictionary definitions for radiant

radiant

/ˈreɪdɪənt/
adjective
1.
sending out rays of light; bright; shining
2.
characterized by health, intense joy, happiness, etc: a radiant countenance
3.
emitted or propagated by or as radiation; radiated: radiant heat
4.
sending out heat by radiation: a radiant heater
5.
(physics) (of a physical quantity in photometry) evaluated by absolute energy measurements: radiant flux, radiant efficiency Compare luminous
noun
6.
a point or object that emits radiation, esp the part of a heater that gives out heat
7.
(astronomy) the point in space from which a meteor shower appears to emanate
Derived Forms
radiantly, adverb
Word Origin
C15: from Latin radiāre to shine, from radius ray of light, radius
Word Origin and History for radiant
adj.

mid-15c., from Middle French radiant and directly from Latin radiantem (nominative radians) "beaming, shining," present participle of radiare "to beam, shine" (see radiation). Of beauty, etc., first attested c.1500. Related: Radiantly.

n.

"point or object from which light radiates," 1727; see radiant (adj.). In astronomy, of meteor showers, from 1864.

radiant in Medicine

radiant ra·di·ant (rā'dē-ənt)
adj.

  1. Emitting heat or light.

  2. Consisting of or emitted as radiation.

n.
A point from which light radiates to the eye.
radiant in Science
radiant
  (rā'dē-ənt)   
Adjective  

  1. Transmitting light, heat, or other radiation. Stars, for example, are radiant bodies.

  2. Consisting of or transmitted as radiation.


Noun  The apparent celestial origin of a meteor shower. For example, a point in the constellation Gemini is the radiant of the Geminid meteor shower.