垂すい直ちょく線せんMeaningsNoun1. perpendicular line; vertical lineKanji used垂droop直straight線linePitch accentすいちょくせんすいちょくせんComposed of垂すい直ちょくvertical; perpendicularNa-adjective線せんline; stripe; stria; line (e.g. telephone line); wire; ray (e.g. X-ray); beam; line (e.g. of a railroad); track; route; …NounExamples1厳げん密みつに言いえば、それは垂すい直ちょく線せんではなかった。Strictly speaking, it was not a vertical line.