the highest point; the top or apex
最高点;顶点。
【剖】 颅顶,头顶;头冠。
【几何】 (多边形、多面体或其他图形的角的)顶点。
a meeting point of two lines that form an angle
(两线相交成角时的)相交点
the point at which an axis meets a curve or surface
(轴与曲线或平面相交时的)点。
"late Middle English: from Latin, ‘whirlpool, crown of a head, vertex', from