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1. one half of a sphere
a. half of the terrestrial globe, divided into northern and southern hemispheres by the equator or into eastern and western hemispheres by some meridians, usually 0° and 180°
b. a map or projection of one of the hemispheres
3. either of the two halves of the celestial sphere that lie north or south of the celestial equator
4. Anatomy short for cerebral hemisphere


(religion, spiritualism, and occult)

Hemisphere literally means a half sphere. In geography, hemisphere refers to the division of Earth into northern, southern, eastern, and western hemispheres. In astrology, hemisphere usually refers to the division of a horoscope into upper and lower halves (using the ascendant-descendant axis as the dividing line) or into left and right halves (using the midheaven-imum coeli axis as the dividing line). The upper and lower hemispheres of a chart are technically termed the diurnal (day, because it is above the horizon) arc and the nocturnal (night, because it is below the horizon) arc, respectively. The left and right hemispheres are termed the oriental (eastern) arc and the occidental (western) arc. These technical terms are rarely used by contemporary astrologers.

In the interpretation of a natal chart, the occurence of many planets above the horizon is said to indicate extroversion; many planets below the horizon indicates introversion. Also, a chart with a preponderance of planets in the left hemisphere is said to indicate an individual who shapes her or his environment, and a preponderance in the right hemisphere indicates an individual who adapts to the environment. These interpretations are tentative, “first impression” delineations and can be quickly abandoned if other factors in a birth chart give contrary indications.


Brau, Jean-Louis, Helen Weaver, and Allan Edmands. Larousse Encyclopedia of Astrology. New York: New American Library, 1980.
Gettings, Fred. Dictionary of Astrology. London: Routledge & Kegan Paul, 1985.


A half of the earth divided into north and south sections by the equator, or into an east section containing Europe, Asia, and Africa, and a west section containing the Americas.
One of the two pieces of a sphere divided by a great circle.
References in periodicals archive ?
It seems to me that we are talking about challenging the notion of irreconcilable differences in some ways: Canada can be both a nation that is urgently bounded and a nation whose boundaries are porous and problematic and need to be engaged hemispherically.
In a scanning electron microscopy (SEM) study of CCA-treated southern pine wood, Vick and Kuster (1992) and Vick (1994) found that the lumen surfaces were coated by a heavy deposits of hemispherically shaped material ranging in diameter from around 1.
Hemispherically it's the effort to create a Free Trade Area of the Americas by the year 2005.
Classic'' is a bit of a hackneyed cliche these days, often misused as an extra adjective to flesh out a piece of descriptive flattery, but the original Beetle design concept earns the designation fairly and squarely - or rather hemispherically.
The quality of the sidemen (it's best not to mention any names to prevent hurt feelings potentially created by involuntary omission) and the combination of instrumental techniques and popular flavor with the deliriously creative environment of the era helped to turn Benny More's orchestra into one of the most sought-after Cuban musical institutions, nationally and hemispherically.
A hemispherically shaped top (12 mm), dropped at a speed of 3.
Yaeger's Dirt and Desire has not moved hemispherically, except to define as acts of violence certain forms of cultural regard--as, for example, the taken-for-granted gaze of the male upon the female.
Sea ice extents and their trends have also been calculated from the same 18-year data set, and these have been analyzed both regionally and hemispherically in Parkinson et al.