n.
Pronunciation: ' v ə r- ˌ teks
Function: noun
Inflected Form: plural ver · ti · ces \ ' v ə r-t ə - ˌ s ē z \ also ver · tex · es
Etymology: Middle English, top of the head, from Latin vertic-, vertex, vortic-, vortex whirl, whirlpool, top of the head, summit, from vertere to turn
Date: 14th century
1 : the top of the head
2 a : the point opposite to and farthest from the base in a figure b : a point (as of an angle, polygon, polyhedron, graph, or network) that terminates a line or curve or comprises the intersection of two or more lines or curves c : a point where an axis of an ellipse, parabola, or hyperbola intersects the curve itself
3 : a principal or highest point : SUMMIT <the vertex of the hill>