radiant energy meaning, radiant energy definition | English Cobuild dictionary

Collins

radiant energy

  

      n   energy that is emitted or propagated in the form of particles or electromagnetic radiation. It is measured in joules.,   (Symbol)    Qe  
English Collins Dictionary - English Definition & Thesaurus  
Collins
radiant  
      adj  
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  
      n  
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  
     (C15: from Latin radiare to shine, from radius ray of light, radius)  
  radiantly      adv  


radiant efficiency  
      n   the ratio of the power emitted by a source of radiation to the power consumed by it.,   (Symbol)    <Geta>e  
radiant energy  
      n   energy that is emitted or propagated in the form of particles or electromagnetic radiation. It is measured in joules.,   (Symbol)    Qe  
radiant exitance  
      n   the ability of a surface to emit radiation expressed as the radiant flux emitted per unit area at a specified point on the surface.,   (Symbol)    Me  
radiant flux  
      n   the rate of flow of energy as radiation. It is measured in watts.,   (Symbol)    <GPhi>e  
radiant heat  
      n   heat transferred in the form of electromagnetic radiation rather than by conduction or convection; infrared radiation  
radiant heating  
      n   a system of heating a building by radiant heat emitted from panels containing electrical conductors, hot water, etc.  
radiant intensity  
      n   a measure of the amount of radiation emitted from a point expressed as the radiant flux per unit solid angle leaving this source.,   (Symbol)    Ie  

English Collins Dictionary - English Definition & Thesaurus  

Collins

radiant

  
1    beaming, bright, brilliant, effulgent, gleaming, glittering, glorious, glowing, incandescent, luminous, lustrous, resplendent, shining, sparkling, sunny  
2    beaming, beatific, blissed out, blissful, delighted, ecstatic, floating on air, gay, glowing, happy, joyful, joyous, on cloud nine     (informal)   rapt, rapturous, sent  
  
Antonyms     
  
1    black, dark, dull, gloomy, sombre  
2    disconsolate, down in the dumps     (informal)   gloomy, joyless, low, miserable, sad, sombre, sorrowful  

English Collins Dictionary - English synonyms & Thesaurus  

Collaborative Dictionary     English Definition
n.
renewable energy obtainable on coasts based on the sea or ocean low and high tides
exp.
spend time and energy doing something that is pointless
expression arisen in the 15th century when Newcastle (England) was a major exporter of coal

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"Collins English Dictionary 5th Edition first published in 2000 © HarperCollins Publishers 1979, 1986, 1991, 1994, 1998, 2000 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"