- Hemisphere is defined as half of the world, globe or brain.
- An example of hemisphere is the southern part of the world.
- An example of hemisphere is the left side of the brain.
- half of a sphere, globe, or celestial body; specif.,
- any of the halves into which the celestial sphere is divided by either the celestial equator or the ecliptic
- 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)
- 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 of hemisphereMiddle English hemisperie ; from Classical Latin hemisphaerium ; from Classical Greek hēmisphairion: see hemi- and amp; sphere
- 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 a. Either of the lateral halves of the cerebrum; a cerebral hemisphere.b. Either of the lateral halves of the cerebellum; a cerebellar hemisphere.
- hem′i·spher′ic , hem′i·spher′i·cal
- (astronomy, astrology) Half of the celestial sphere, as divided by either the ecliptic or the celestial equator [from 14th c.].
- (figuratively) A realm or domain of activity .
- (geography) Half of the Earth, such as the Northern Hemisphere, Southern Hemisphere, Western Hemisphere or Eastern Hemisphere, Land Hemisphere, Water Hemisphere etc. [1550s].
- (geometry) Any half-sphere, formed by a plane intersecting the center of a sphere. [1580s].
- (cartography) A map or projection of a celestial or terrestrial hemisphere .
- (anatomy) Either of the two halves of the cerebrum. .
From Latin hemisphaerium, from Ancient Greek ἡμισφαίριον (hēmisphairion), from ἡμι- (hēmi-, “half”) + σφαῖρα (sphaira).