らせんかいだん 螺旋階段 LinksSentence search for 螺旋階段Sentence search for らせんかいだんSentence search for らせん階段Kanji details for 螺, 旋, 階 and 段Edit in JMdict Noun1. spiral staircaseOther formsらせん階段 【らせんかいだん】 Discussions Log in to talk about this word.