Definition from Wiktionary, the free dictionary
From Latin radiatio.
radiation (plural radiations)
- The shooting forth of anything from a point or surface, like the diverging rays of light; as, the radiation of heat.
- The process of radiating waves or particles.
- The transfer of energy via radiation (as opposed to convection or conduction)
- Radioactive energy
Derived terms 
shooting forth of anything from a point or surface
process of radiating waves or particles
transfer of energy via radiation
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Translations to be checked
- IPA: /ʁa.dja.sjɔ̃/
radiation f (plural radiations)
- radiation (all meaning)