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radiation biology
radiation oncology
radiation pressure
radiation sickness
radiation therapy
radiational cooling
radiative collision
radiative forcing
radiator
radical
radical chic
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radicalise
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radiant

ra·di·ant [ ráydee ənt ]


adjective 
Definition:
 
1. showing happiness: expressing joy, energy, or good health in a pleasing way

2. shining: lit with a bright or glowing light

3. physics emitted as waves: describes light, heat, or other energy emitted in the form of rays or waves
radiant heat

4. physics emitting radiant energy: emitting light, heat, or other energy in the form of rays or waves



noun  (plural ra·di·ants)
Definition:
 
1. heating element: an element in a heater that gives out radiant heat

2. astronomy point of origin of meteor shower: a point in space from which a meteor shower appears to originate

[15th century. < Latin radiant-, present participle of radiare (see radiate)]

ra·di·ant·ly adverb
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