背はい景けい放ほう射しゃMeaningsNoun1. background radiationKanji used背back of the body景scenery放release射shootComposed of背はい景けいbackground; scenery; backdrop; setting; background (of an incident, situation, etc.); circumstances; context; backing; support (from behind the scenes)Noun放ほう射しゃradiation; emissionNoun