perpendicular /ˌpɜːpənˈdɪkjʊlə/ TEM4

• 1. 

  ADJ A perpendicular line or surface points straight up, rather than being sloping or horizontal. 垂直的 [usu ADJ n]

  例：

  We made two slits for the eyes and a perpendicular line for the nose.

  我们划了两道缝儿做眼睛,一条竖线做鼻子。

  例：

  The sides of the mountain are almost perpendicular.

  山的两侧几乎是垂直的。

• 2. 

  ADJ If one thing is perpendicular to another, it is at an angle of 90 degrees to it. 垂直于的 [正式] [usu v-link ADJ 'to' n]

  例：

  The left wing dipped until it was perpendicular to the ground.

  左翼下垂至与地面成90度角。