名詞 vertex:

1. the point of intersection of lines or the point opposite the base of a figure
2. the highest point (of something)
   同義詞：peak, apex, acme

1. The perpendicular distance from the base of a geometric figure to the opposite vertex, parallel side, or parallel surface.
   頂垂線，高線從一個幾何形體的底邊到相對的頂點、平行邊或平行面的垂直距離
2. Situated at the vertex or highest point; directly overhead.
   頂點的在頂點或者最高點的; 頭的正上方的

ver.tex

n.（名詞）
【復數(shù)】 ver.tex.es 或 ver.ti.ces [-t-sôz.]
The highest point; the apex or summit:
最高點；頂點或頂峰：
例句：
the vertex of a mountain.
山峰

Anatomy
【解剖學】
The highest point of the skull.
顱頂
The top of the head.
頭頂
Astronomy The highest point reached in the apparent motion of a celestial body.
【天文學】 天頂：一個天體的明顯運動達到最高點
Mathematics
【數(shù)學】
The point at which the sides of an angle intersect.
頂點：角的兩邊相交的點
The point on a triangle or pyramid opposite to and farthest away from its base.
角頂：三角形或者角錐的與其底邊相對且具底邊最遠的頂點
A point on a polyhedron common to three or more sides.
頂點：共有三個或者三個以上邊的多面體的頂點

來源：
Latin [whirling column, vertex]
拉丁語 [旋轉(zhuǎn)的柱子，頂點]
from vertere [to turn] * see wer- 2
源自 vertere [轉(zhuǎn)向] *參見 wer- 2