- emitting rays of light; shining; bright: the radiant sun; radiant colors.
- bright with joy, hope, etc.: radiant smiles; a radiant future.
- Physics. emitted or propagated by radiation.
- noting a partition line having a series of flamelike indentations formed by ogees joined in zigzags; rayonny.
- (of a charge, as an ordinary) having an edge or edges so formed.
- a point or object from which rays proceed.
- Astronomy. the point in the heavens from which a shower of meteors appears to radiate.
- a refractory absorbing and radiating heat from the flames of a gas fireplace or the like.
- sending out rays of light; bright; shining
- characterized by health, intense joy, happiness, etca radiant countenance
- emitted or propagated by or as radiation; radiatedradiant heat
- sending out heat by radiationa radiant heater
- physics (of a physical quantity in photometry) evaluated by absolute energy measurementsradiant flux; radiant efficiency Compare luminous
- a point or object that emits radiation, esp the part of a heater that gives out heat
- astronomy the point in space from which a meteor shower appears to emanate
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.
“point or object from which light radiates,” 1727; see radiant (adj.). In astronomy, of meteor showers, from 1864.
- Emitting heat or light.
- Consisting of or emitted as radiation.
- A point from which light radiates to the eye.
- Transmitting light, heat, or other radiation. Stars, for example, are radiant bodies.
- Consisting of or transmitted as radiation.
- The apparent celestial origin of a meteor shower. For example, a point in the constellation Gemini is the radiant of the Geminid meteor shower.