# vertex

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## vertex

**1.**

*Maths*

**a.**the point opposite the base of a figure

**b.**the point of intersection of two sides of a plane figure or angle

**c.**the point of intersection of a pencil of lines or three or more planes of a solid figure

**2.**

*Astronomy*a point in the sky towards which a star stream appears to move

**3.**

*Anatomy*the crown of the head

## Vertex

## Vertex

(religion, spiritualism, and occult)In geometry, a vertex is the pivot point of an angle. In astrology, the vertex is the point in a horoscope where the prime vertical intersects the ecliptic in the west. The antivertex is the corresponding point in the east. The vertex was discovered/invented by L. Edward Johndro and elaborated upon by Charles Jayne. The point where the vertex falls in a chart is said to be the most fated (i.e., least amenable to conscious choices) part of the horoscope. All major astrological chart-casting software programs allow one to calculate the vertex.

## Vertex

the point on the celestial sphere toward which the peculiar motions of stars are predominantly directed. There are two such points, diametrically opposed on the celestial sphere, with the galactic coordinates *l* = 344°, *b* -1° and *l* = 164°, *b* = 1°.

## vertex

[′vər‚teks]## vertex

**i**. The last fix adapted on the arrival speed segment. Normally, it will be the outer marker of the runway in use. However, it may be the actual threshold or another suitable common point on the approach path for the particular runway configuration.

**ii**. In astronavigation, the vertex of a great circle is the point at which the great circle is nearest the geographic pole—that is, the point at which it reaches the maximum latitude. Every great circle has two vertices (one in each hemisphere). In the solution of great-circle sailing problems, only the vertex nearest the arc forming the great-circle track is considered.