vertex
https://gyazo.com/cf292bd6137fa4105f8d91d06d0efe92
source: By Cflm001 (talk) - Own work. Derived from File:Remint3.JPG by HAHA VENOM, released under GFDL/CC-BY-SA-3.0. Written in Times New Roman size 18., CC BY-SA 3.0
noun (plural vertices | -təˌsēz | or vertexes)
1. the highest point; the top or apex.: 最も高い点; 頂上、頂点
頂上, 頂点
Anatomy the crown of the head.: 脳天
2. Geometry each angular point of a polygon, polyhedron, or other figure.: 多角形、多面体、他の図形の各々の角ばった点
〘数〙 頂点, 角頂;
a meeting point of two lines that form an angle.: 角度を作る2辺が交わる点
(2辺の)交点
the point at which an axis meets a curve or surface.: 軸が曲線や面と交わる点
ORIGIN
late Middle English: from Latin, ‘whirlpool, crown of a head, vertex’, from vertere ‘to turn’.