A turning point; the principal or highest point; top; summit; crown; apex.

The top, or crown, of the head.

The zenith, or the point of the heavens directly overhead.

The point in any figure opposite to, and farthest from, the base; the terminating point of some particular line or lines in a figure or a curve; the top, or the point opposite the base.

Region on top of the head that is behind the anterior ocellus and between the eyes (see also temple). [drawing][photo][photo

The anterior and medial margin of the cephalic dorsal surface.

Dorsal area of the insect head above and posterior to the antennae.

The top of the head between the eyes, from the anterior margin of the median ocellus to the occiput.

Another name for a node. See Also Node. XYZ

See graph. Informally, a vertex is located at the end of an edge and is usually represented pictorially by a dot. Definitions: W

(n.) component of a graph, also sometimes called a node.

the geometric center of a mirror.

The geometrical centre of the mirror

The center of a mirror or lens.