Hemisphere

hemisphere
    n 1: half of the terrestrial globe
    2: half of a sphere
    3: either half of the cerebrum [syn: {hemisphere}, {cerebral
       hemisphere}]
    

Hemisphere \Hem"i*sphere\, n. [L. hemisphaerium, Gr. ?; ? half =
   ? sphere: cf. F. h['e]misph[`e]re. See {Hemi-}, and
   {Sphere}.]
   1. A half sphere; one half of a sphere or globe, when divided
      by a plane passing through its center.
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   2. Half of the terrestrial globe, or a projection of the same
      in a map or picture.
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   3. The people who inhabit a hemisphere.
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            He died . . . mourned by a hemisphere. --J. P.
                                                  Peters.
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   {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      can be withdrawn by an air pump; -- used to illustrate the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. Hemispheric
    

33 Moby Thesaurus words for "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