sphere
noun
°A regular three-dimensional object in which every cross-section is a circle; the figure described by the revolution of a semi-circle about its diameter.
°The set of all points in three-dimensional Euclidean space (or -dimensional space, in topology) that are a fixed distance from a fixed point.
synonyms: ball, globe, orb, area more» , domain, field, orbit, sector, 3-sphere, 2-sphere, celestial sphere, celestial body