The hemisphere of the Earth (or any celestial body) to the north of its equator.

The hemisphere of the Earth (or any celestial body) to the south of its equator.

(neuroanatomy) One of the two regions of the brain that are delineated by the body's median plane.

plural of cerebral hemisphere

(uncountable) Alternative spelling of Eastern Hemisphere / Used other than figuratively or idiomatically: see eastern, hemisphere.

(uncountable) Alternative spelling of Western Hemisphere / Used other than figuratively or idiomatically: see western, hemisphere.

plural of Magdeburg hemisphere

(historical) Either of a pair of large copper hemispheres, with mating rims, that were used to demonstrate the power of atmospheric pressure. When the rims were sealed with grease and the air was pumped out, the sphere contained a vacuum and could not be pulled apart even by teams of horses.

plural of Southern Hemisphere

plural of Northern Hemisphere.