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Related to hemisphere: western hemisphere


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 ?
Approach motivation is computed by the hemisphere that controls the right hand in right-handers, and by the hemisphere that controls the left hand in left-handers," stated Casasanto.
Similar findings came from epileptic patients who underwent a medical procedure in which one brain hemisphere at a time was anesthetized.
The first Crescent receiver to employ the Hemisphere ASIC is the new Crescent OEM module - an integrated circuit board receiver.
the Western Hemisphere, which Europeans believed had been "discovered" by Christopher Columbus
The overall strategy being pursued by Beijing in the Western Hemisphere follows "a classic mercantilist or even neo-colonial model," Hawkins contends.
Our economic relationships in the Western Hemisphere are important, and if they were all that we had at stake here, the region would demand our careful attention.
In addition to handling ocean borne cargo, the ports of the Western Hemisphere provide facilities to transfer cargo between ships, barges, trucks and railroads.
Even though the brain's hemispheres are virtually identical, certain areas (like the language center, (for example) may be larger in one hemisphere.
With many of wines new superpowers operating and farming in the Southern Hemisphere or, to be more accurate, in Australia in particular, our has published its first study of Southern Hemisphere grape supply and wine production.
Jones of the University of East Anglia discovered an unexpectedly abrupt cooling event that occurred between roughly 1968 and 1972 in Northern Hemisphere ocean temperatures.
This motor behavior is "cross-lateralized," while using right hand, the dominant left hemisphere is activated.
Due to Red Planet's orbit, the rovers will have to endure longer, colder autumns and winters in the southern hemisphere compared to if they had been in the north.