うちゅうはいけいほうしゃ 宇宙背景放射 LinksSentence search for 宇宙背景放射Sentence search for うちゅうはいけいほうしゃKanji details for 宇, 宙, 背, 景, 放 and 射Edit in JMdict Noun1. cosmic background radiation Discussions Log in to talk about this word.