Hemisphere

Noun

 * , Half of the celestial sphere, as divided by either the ecliptic or the celestial equator.
 * 1)   A realm or domain of activity.
 * 2)  Half of the Earth, such as the Northern Hemisphere, Southern Hemisphere, Western Hemisphere or Eastern Hemisphere, Land Hemisphere, Water Hemisphere etc..
 * 3)  Any half-sphere, formed by a plane intersecting the center of a sphere..
 * 4)  A map or projection of a celestial or terrestrial hemisphere.
 * 5)  Either of the two halves of the cerebrum..

Synonyms

 * celestial hemisphere
 * terrestrial hemisphere
 * sphere
 * half-sphere, half sphere
 * cerebral hemisphere
 * planisphere

Thesaurus
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