radiant (redirected from Radiant (disambiguation))

radiant: see meteor shower.

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radiant

1. emitted or propagated by or as radiation; radiated

2. Physics (of a physical quantity in photometry) evaluated by absolute energy measurements

3. a point or object that emits radiation, esp the part of a heater that gives out heat

4. Astronomy the point in space from which a meteor shower appears to emanate

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radiant [′rād·ē·ənt]

(astronomy)

A point on the celestial sphere through which pass the backward extensions of the trail of a meteor as observed at various locations, or the backward extensions of trails of a number of meteors traveling parallel to each other.

A point on the celestial sphere toward which the stars in a moving cluster appear to travel.

(physics)

Pertaining to motion of particles or radiation along radii from a common point or a small region.

A point, region, substance, or entity from which particles or radiations are emitted.