hemisphere
//ˈhɛmɪˌsfɪər//
Noun
hemisphereSingular
hemispheresPlural
1
Half of a sphere, especially half of the Earth divided by the equator (Northern and Southern Hemispheres) or by a meridian (Eastern and Western Hemispheres).
Australia is located in the Southern Hemisphere.
2
Either of the two halves of the brain, known as the left and right cerebral hemispheres.
The left hemisphere of the brain controls language and logical thinking.