(redirected from Hemispheres)
Also found in: Dictionary, Thesaurus, Medical.


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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005


(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.
The Astrology Book, Second Edition © 2003 Visible Ink Press®. All rights reserved.


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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
In the Northern Hemisphere, Antares is a summer star.
London, May 17 ( ANI ): Black carbon aerosols and tropospheric ozone, both manmade pollutants emitted predominantly in the Northern Hemisphere's low-to mid-latitudes, are most likely pushing the boundary of the tropics further poleward in that hemisphere, a new study has revealed.
McGilchrist's research on the basis of which he confronts the nihilism of our culture is focussed on the lateralization of the brain and the different functions of the different hemispheres. It draws on a range of disciplines, including psychiatry and neuroscience, evolutionary theory, archeology, cultural history, linguistics and philosophy and its history.
The word hemisphere comes from a Greek word that means "half a sphere." Geographers divide Earth into four different hemispheres, generally as a way to locate places more easily on a map.
Our brains are divided into two hemispheres, and the hemispheres are anatomically and functionally highly unsymmetrical.
The change was an attempt to clear up confusion by compensating for differences in the racing seasons of the two hemispheres, since southern hemisphere racing jurisdictions in particular felt the merit of their best horses was not fairly represented in the traditional January classification, which came midway through their season.
The formed parts are covered on top by cast thermoset urethane sheets that are adhesive bonded to the twin hemispheres.
United Airlines (NASDAQ:UAUA) has announced that it has selected Ink Publishing to produce its in-flight magazine, Hemispheres.
Prof Davies, who also works with Welsh Rugby Union players to examine their aerobic fitness, said, "Genetics and the type of muscles people in different parts of the world have could contribute to the difference between the two hemispheres, but this does not apply to all people from all Southern hemisphere countries.
Three different measurements were taken using a pachimeter (Mitutoyo) and a goniometer (Carci) on both hemispheres: M1--the length of the lateral sulcus; M2--the distance from the lateral sulcus to the inferior margin of the inferior temporal gyrus, and M3--the angle formed between the lines of the collateral sulcus and the inferior margin of the inferior temporal gyrus.
Heatherton of Dartmonth College in Hanover, N.H., and his coworkers reported in 2003 on a patient who had had surgery to disconnect the bundle of nerve fibers that connects the neural hemispheres. That split-brain patient recognized himself in images that blended his features with those of one of the researchers only when the images appeared in his right visual field and were thus handled by his left brain.
New Zealand coach Graham Henry maintains there is no great divide between the hemispheres - despite the All Blacks' romp to grand slam glory.