The hemisphere of the Earth to the east of the Greenwich Meridian (zero degree longitude) and west of 180 degrees longitude (approximately the International Date Line).

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 Southern Hemisphere

plural of Northern Hemisphere.

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

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