perpendicular

英 [ˌpɜːpənˈdɪkjələ(r)]

美 [ˌpɜːrpənˈdɪkjələr]

adj. 垂直的; 成直角的; 垂直式的(英国14、15世纪盛行的建筑风格，以使用垂直线和大拱为特征)
n. 垂直线(或位置、方向)

BNC.22300 / COCA.13882

牛津词典

adj.

垂直的；成直角的
forming an angle of 90˚ with another line or surface; vertical and going straight up
1. Are the lines perpendicular to each other?
  这些直线相互垂直吗？
2. The staircase was almost perpendicular (= very steep) .
  楼梯几乎成垂直的了。
垂直式的（英国14、15世纪盛行的建筑风格，以使用垂直线和大拱为特征）
connected with a style of architecture common in England in the 14th and 15th centuries, that makes use of vertical lines and wide arches

noun

垂直线（或位置、方向）
a line, position or direction that is exactly perpendicular
1. The wall is a little out of the perpendicular.
  墙壁有点倾斜。

ADJ-GRADED 垂直的；笔直的
Aperpendicularline or surface points straight up, rather than being sloping or horizontal.
1. 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,另外划了一条竖线做鼻子。
2. The sides of the loch are almost perpendicular.
  湖岸几乎都是垂直的。
ADJ 垂直（于）的；成90度角的
If one thing isperpendicular toanother, it is at an angle of 90 degrees to it.
1. The left wing dipped until it was perpendicular to the ground.
  左翼下垂至与地面成90度角。

noun

an extremely steep face
a cord from which a metal weight is suspended pointing directly to the earth's center of gravity
Synonym:plumb line
a Gothic style in 14th and 15th century England
Synonym:perpendicular styleEnglish-GothicEnglish-Gothic architecture
a straight line at right angles to another line

adj

extremely steep
1. the great perpendicular face of the cliff
at right angles to the plane of the horizon or a base line
1. a vertical camera angle
2. the monument consists of two vertical pillars supporting a horizontal slab
3. measure the perpendicular height
Synonym:vertical
intersecting at or forming right angles
1. the axes are perpendicular to each other

In other words, it's perpendicular to the plane of the two vectors.
换句话说，它垂直于，两个向量所处的平面。
The perpendicular line through a given segment's midpoint.
这条垂线通过给定线段的中点（中垂线）。
The line of sight must be approximately perpendicular to the horizontal axis.
视线必须近似地垂直于水平轴。
The directional derivative in a direction that's perpendicular to the gradient is basically zero.
垂直于梯度的方向上，方向导数为零。
The plumb line is always perpendicular to the horizontal plane.
铅垂线总是垂直于水平面的。
But we know another vector that is also perpendicular to the level set of g.That is the gradient of g.
但我们知道有另外一个向量也是和g的等值面垂直的，这个向量就是g的梯度。
Let AB be perpendicular to CD.
设AB垂直于CD。
A surface having parabolic sections parallel to a single coordinate axis and elliptic sections perpendicular to that axis.
抛物面一种有与单坐标轴平行的抛物截面和与该轴垂直的椭圆截面的平面。
Do you mean how do I know that it is perpendicular to a level curve?
你想问的是，我如何知道它是和等高线垂直的吗？
The arranging direction of the flaky fins is perpendicular to the wind direction;
所述的片状翅片的排列方向和风向是垂直的；