EXAMPLES FROM THE WEB FOR VERTEX
Comate -us: only the upper part of head, or vertex, covered with hair.
Facial angle: the angle formed by the junction of the face and vertex.
Fastigium: Orthoptera; the extreme point or front of vertex.
Sinciput: in Coleoptera; that part of the vertex between the eyes.
Synciput: that portion of the vertex lying between the eyes.
Vertexal: occurring on or near the vertex, or directed toward it.
Black; the joints of the antennæ, from the 6th to 13th, white, the vertex also white.
Also a right line proceeding from the vertex of a cone to the middle of its base.
The summit or vertex of anything; as the upper point of a triangle.
The angle opposite the base of a triangle is called the vertex.