noun (n)

• half of the terrestrial globe(noun.location)

  source: wordnet30
• half of a sphere(noun.shape)

  source: wordnet30
• either half of the cerebrum(noun.body)

  Synonym:
  cerebral hemisphere
  

  source: wordnet30
• A half sphere; one half of a sphere or globe, when divided by a plane passing through its center.(noun)

  source: webster1913