垂直 chuízhí perpendicular
perpendicular; vertical
How to remember 垂直: 垂 droop + 直 straight = perpendicular.
Characters
How it is used
- Perpendicular or vertical: 垂直起降 (chuízhí qǐjiàng) vertical takeoff and landing, 两条线垂直 (liǎng tiáo xiàn chuízhí) the two lines are perpendicular.
- Covers both 'straight up-and-down' and 'at a right angle to' - geometry and everyday orientation.
- In business jargon 垂直领域 (chuízhí lǐngyù) means a vertical/niche market.