vertex

ver·tex  (vûrtks)

n. pl. ver·ti·ces (-t-sz) also ver·tex·es

1. The highest point; the apex or summit: the vertex of a mountain.

2. Anatomy

a. The highest point of the skull.

b. The top of the head.

3. Astronomy The highest point reached in the apparent motion of a celestial body.

4. Mathematics

a. The point at which the sides of an angle intersect.

b. The point on a triangle or pyramid opposite to and farthest away from its base.

c. A point on a polyhedron common to three or more sides.

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[Latin, whirlpool, crown of the head (where the hair forms a whorl), vertex, from vertere, to turn; see wer-² in Indo-European roots.]

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vertex [ver-tex, -tiss-seez]

Noun

pl -tices

1. the highest point

2. Maths

a. the point on a geometric figure where the sides form an angle

b. the highest point of a triangle [Latin: top]

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vertex  (vûrtks)

Plural vertices (vûrt-sz) or vertexes

1. The point at which the sides of an angle intersect.

2. The point of a triangle, cone, or pyramid that is opposite to and farthest away from its base.

3. A point of a polyhedron at which three or more of the edges intersect.

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In artillery and naval gunfire support, the highest point in the trajectory of a projectile.

Thesaurus

Noun	1.	vertex - the point of intersection of lines or the point opposite the base of a figure intersection, intersection point, point of intersection - a point where lines intersect
	2.	vertex - the highest point (of something); "at the peak of the pyramid" apex, acme, peak crown - the part of a hat (the vertex) that covers the crown of the head roof peak - the highest point of a roof extreme point, extremum, extreme - the point located farthest from the middle of something