Definitions
hemisphere Tweet Definition of hemisphere Like Definition of hemisphere on Facebook
noun 
  1. (geometry) A half-sphere, formed by a plane intersecting the center of a sphere.
  2. (geography) Half of the Earth, the Northern Hemisphere, Southern Hemisphere, Western Hemisphere or Eastern Hemisphere.
  3. (anatomy) Either of the two halves of the cerebrum.
Etymology: From hemisphírium < Ancient Greek (polytonic, á) (hÄmisphairion) < (polytonic, á-) (hÄmi-) "half" and (polytonic, á) (sphaira) "sphere"


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