Hemisphere

n.	1.	A half sphere; one half of a sphere or globe, when divided by a plane passing through its center.
	2.	Half of the terrestrial globe, or a projection of the same in a map or picture.
	3.	The people who inhabit a hemisphere. He died . . . mourned by a hemisphere. - J. P. Peters. Cerebral hemispheres (Anat.) See Brain. Magdeburg hemispheres (Physics) two hemispherical cups forming, when placed together, a cavity from which the air can be withdrawn by an air pump; - used to illustrate the pressure of the air. So called because invented by Otto von Guericke at Magdeburg.

Noun	1.	hemisphere - half of the terrestrial globe
	2.	hemisphere - half of a sphere
	3.	hemisphere - either half of the cerebrum Synonyms: cerebral hemisphere

ambit, arena, bailiwick, beat, border, borderland, circle, circuit, demesne, department, domain, dominion, field, fifty percent, fifty-fifty, half, half-and-half, judicial circuit, jurisdiction, march, mediety, moiety, orb, orbit, pale, precinct, province, realm, round, semicircle, semisphere, sphere, walk