螺ら旋せん階かい段だんMeaningsNoun1. spiral staircaseOther spellingsらせん階かい段だんUsage share unknownKanji used螺spiral旋swirl階floor (of a building)段stepPitch accentらせんかいだんComposed of螺ら旋せんspiral; helix; screwNoun階かい段だんstairs; stairway; staircaseNoun