螺ら線せん面めん

noun

helicoid

A mathematical surface generated by a line rotating and moving along an axis; a specific type of ruled surface.

• 螺ら線せん面めんは、直ちょく線せんがらせん運うん動どうをすることでできる曲きょく面めんである。

  A helicoid is a curved surface formed by a line undergoing helical motion.