English definition of Sphere

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Definition of sphere

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Sphere (n.) The apparent surface of the heavens, which is assumed to be spherical and everywhere equally distant, in which the heavenly bodies appear to have their places, and on which the various astronomical circles, as of right ascension and declination, the equator, ecliptic, etc., are conceived to be drawn; an ideal geometrical sphere, with the astronomical and geographical circles in their proper positions on it..

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Extend :: Extend (v. t.) To enlarge; to widen; to carry out further; as, to extend the capacities, the sphere of usefulness, or commerce; to extend power or influence; to continue, as time; to lengthen; to prolong; as, to extend the time of payment or a season of trail..

Sphere :: Sphere (n.) An orbit, as of a star; a socket..

Sheep :: Sheep (n. sing. & pl.) Any one of several species of ruminants of the genus Ovis, native of the higher mountains of both hemispheres, but most numerous in Asia..

Atmospherical :: Atmospherical (a.) Existing in the atmosphere.

Faculae :: Faculae (n. pl.) Groups of small shining spots on the surface of the sun which are brighter than the other parts of the photosphere. They are generally seen in the neighborhood of the dark spots, and are supposed to be elevated portions of the photosphere..

Hercules :: Hercules (n.) A constellation in the northern hemisphere, near Lyra..

Spermosphere :: Spermosphere (n.) A mass or ball of cells formed by the repeated division of a male germinal cell (spermospore), each constituent cell (spermoblast) of which is converted into a spermatozoid; a spermatogemma..

Pinus :: Pinus (n.) A large genus of evergreen coniferous trees, mostly found in the northern hemisphere. The genus formerly included the firs, spruces, larches, and hemlocks, but is now limited to those trees which have the primary leaves of the branchlets reduced to mere scales, and the secondary ones (pine needles) acicular, and usually in fascicles of two to seven. See Pine..

Westness :: Westness (n.) A watery or moist state of the atmosphere; a state of being rainy, foggy, or misty; as, the wetness of weather or the season..

Department :: Department (v. i.) A distinct course of life, action, study, or the like; appointed sphere or walk; province..

Trepidation :: Trepidation (n.) A libration of the starry sphere in the Ptolemaic system; a motion ascribed to the firmament, to account for certain small changes in the position of the ecliptic and of the stars..

Astrolabe :: Astrolabe (n.) A stereographic projection of the sphere on the plane of a great circle, as the equator, or a meridian; a planisphere..

Point :: Point (n.) A fixed conventional place for reference, or zero of reckoning, in the heavens, usually the intersection of two or more great circles of the sphere, and named specifically in each case according to the position intended; as, the equinoctial points; the solstitial points; the nodal points; vertical points, etc. See Equinoctial Nodal..

Baroscope :: Baroscope (n.) Any instrument showing the changes in the weight of the atmosphere; also, less appropriately, any instrument that indicates -or foreshadows changes of the weather, as a deep vial of liquid holding in suspension some substance which rises and falls with atmospheric changes..

Coccosphere :: Coccosphere (n.) A small, rounded, marine organism, capable of braking up into coccoliths..

Blastocoele :: Blastocoele (n.) The cavity of the blastosphere, or segmentation cavity..

Sphericle :: Sphericle (n.) A small sphere.

Arena :: Arena (n.) Any place of public contest or exertion; any sphere of action; as, the arenaof debate; the arena of life..

Dragon :: Dragon (n.) A constellation of the northern hemisphere figured as a dragon; Draco.

Spheroconic :: Spheroconic (n.) A nonplane curve formed by the intersection of the surface of an oblique cone with the surface of a sphere whose center is at the vertex of the cone.