- 垂直线 chuízhíxiàn vertical line
- 垂直轴 chuízhízhóu vertical axisthe vertical coordinate line in a graph or coordinate system, typically the y-axis
- 垂直尾翼 chuízhíwěiyì tailfin(aviation) tailfin; vertical stabilizer
- 垂直和短距起落飞机 chuízhíhéduǎnjùqǐluòfēijī V/STOL aircraftvertical or short takeoff and landing (V/STOL) aircraft
- 垂直起落飞机 chuízhíqǐluòfēijī VTOL aircraftvertical takeoff and landing aircraft
- 母子垂直感染 mǔzǐchuízhígǎnrǎn vertical transmissionmother-to-infant transmission
