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Definition of hemisphere


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hem·i·sphere  audio  (hm-sfîr) KEY 

NOUN:
    1. A half of a sphere bounded by a great circle.
    2. A half of a symmetrical, approximately spherical object as divided by a plane of symmetry.
  1. Either half of the celestial sphere as divided by the ecliptic, the celestial equator, or the horizon.
  2. Either the northern or southern half of the earth as divided by the equator or the eastern or western half as divided by a meridian.
  3. Anatomy Either of the lateral halves of the cerebrum; a cerebral hemisphere.


OTHER FORMS:
hemi·spheric  (-sfîrk, -sfr-) KEY  or hemi·spheri·cal(Adjective), hemi·spheri·cal·ly(Adverb)


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