切線 [ㄑㄧㄝ ㄒㄧㄢˋ; qie1 xian4] tangent line (geometry) ◄ ►
接線 切線 せっせん noun (common) (futsuumeishi) nouns which may take the genitive case particle `no' geometry term tangent tangent line tangential line ◄ ►