perpendicular
adjective uk/ˌpɜː.pənˈdɪk.jə.lər/ us/ˌpɝː.pənˈdɪk.juː.lɚ/
formal垂直的，成直角的
at an angle of 90° to a horizontal line or surface
We scrambled up the nearly perpendicular side of the mountain. 我们沿几乎垂直的山坡吃力地向上爬。
mathematics specialized与…垂直（或成直角）的
at an angle of 90° to another line or surface
The wheel rotates around an axis that is perpendicular to the plane. 轮子绕着一个与平面垂直的轴旋转。
perpendicular
noun [ C ] mathematics specialized uk/ˌpɜː.pənˈdɪk.jə.lər/ us/ˌpɝː.pənˈdɪk.juː.lɚ/
垂线
a perpendicular line
Draw a perpendicular from the vertex of the triangle to its base. 从三角形的顶点画一条垂线到底边。
the perpendicular 垂直位置;垂直方向
a perpendicular position or direction
The wall was leaning at an angle of ten degrees to the perpendicular. 墙壁倾斜，与垂直面成10度角。