Hemisphere
WordNet
noun
(1) Either half of the cerebrum
(2) Half of the terrestrial globe
(3) Half of a sphere
WiktionaryText
Etymology
From hemisphærium < (hēmisphairion) < (hēmi-) "half" and (sphaira) "sphere"
Noun
- A half-sphere, formed by a plane intersecting the center of a sphere.
- Half of the Earth, the Northern Hemisphere, Southern Hemisphere, Western Hemisphere or Eastern Hemisphere.
- Either of the two halves of the cerebrum.