1. A spherical body; a globe; especially, one of the heavenly bodies: a sun, planet, or star.
2. A circle; esp., a circle, or nearly circular orbit, described by the revolution of a heavenly body; an orbit.
3. A period of time marked off by the revolution of a heavenly body.
4. One of the azure transparent spheres thought by the ancients to be inclosed one within another, and to carry the heavenly bodies in their revolutions.
5. (Archaic) The eye, as luminous and spherical.
6. A sphere of action. + prikaži više

ETYM Old Eng. spere, Old Fren. espere, French sphčre, Latin sphaera. Greek spheros a sphere, a ball.
1. A three-dimensional closed surface such that every point on the surface is equidistant from the center.
2. Any ball-shaped artifact.
> 3. A solid figure bounded by a spherical surface (including the space it encloses).
4. A particular environment or walk of life; SYN. domain, area, orbit, field, arena.
5. The geographical area in which one nation is very influential; SYN. sphere of influence.
In mathematics, a perfectly round object with all points on its surface the same distance from the center. This distance is the radius of the sphere. For a sphere of radius r, the volume V = 4/3pr3 and the surface area A = 4pr2. + prikaži više