hemisphere

Hemisphere is defined as half of the world, globe or brain.

(noun)

See hemisphere in Webster's New World College Dictionary

noun

half of a sphere, globe, or celestial body; specif.,
1. any of the halves into which the celestial sphere is divided by either the celestial equator or the ecliptic
2. any of the halves of the earth: the earth is divided by the equator into the N and S hemispheres and by a meridian into the E Hemisphere (containing Europe, Asia, Africa, and Australia) and the W Hemisphere (containing the Americas and Oceania)
3. a model or map of any of these halves
the countries and peoples of any of the earth's hemispheres
an area of action, knowledge, etc.
either lateral half of the cerebrum or cerebellum

Origin: ME hemisperie < L hemisphaerium < Gr hēmisphairion: see hemi- & sphere

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See hemisphere in American Heritage Dictionary 4

noun

a. A half of a sphere bounded by a great circle.
b. A half of a symmetrical, approximately spherical object as divided by a plane of symmetry.
Either half of the celestial sphere as divided by the ecliptic, the celestial equator, or the horizon.
Either the northern or southern half of the earth as divided by the equator or the eastern or western half as divided by a meridian.
Anatomy Either of the lateral halves of the cerebrum; a cerebral hemisphere.

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