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- Hemisphere -
pronounced [hem-i-sfeer]
pronounced [hem-i-sfeer]
noun
2. a map or projection representing one of these halves.
3. a half of a sphere.
4. Anatomy . either of the lateral halves of the cerebrum or cerebellum.
5. the area within which something occurs or dominates; sphere; realm.
Origin
1. ( often initial capital letter 
) half of the terrestrial globe or celestial sphere, especially one of the halves into which the earth is divided. Compare Eastern Hemisphere, Western Hemisphere, Northern Hemisphere, Southern Hemisphere.
) half of the terrestrial globe or celestial sphere, especially one of the halves into which the earth is divided. Compare Eastern Hemisphere, Western Hemisphere, Northern Hemisphere, Southern Hemisphere. 2. a map or projection representing one of these halves.
3. a half of a sphere.
4. Anatomy . either of the lateral halves of the cerebrum or cerebellum.
5. the area within which something occurs or dominates; sphere; realm.
Origin
late 14c., from L. hemisphærium, from Gk. hemisphairion, from hemi- "half" + sphaira "sphere."
http://dictionary.reference.com/browse/hemisphere
http://dictionary.reference.com/browse/hemisphere
