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hemisphere

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noun hemi·sphere \ˈhe-mə-ˌsfir\

Simple Definition of hemisphere

  • : a half of the Earth

  • : half of a sphere : half of a round object

  • : either of the two halves of the brain

Full Definition of hemisphere

  1. 1 a :  a half of the celestial sphere as divided into two halves by the horizon, the celestial equator, or the ecliptic b :  half of a spherical or roughly spherical body (as a planet); specifically :  the northern or southern half of the earth as divided by the equator or the eastern or western half as divided by a meridian c :  the inhabitants of a terrestrial hemisphere

  2. 2 :  realm, province

  3. 3 :  one of two half spheres formed by a plane through the sphere's center

  4. 4 :  a map or projection of a celestial or terrestrial hemisphere

  5. 5 :  cerebral hemisphere

hemi·spher·ic play \ˌhe-mə-ˈsfir-ik, -ˈsfer-\ or hemi·spher·i·cal play \-ˈsfir-i-kəl, -ˈsfer-\ adjective

Examples of hemisphere

  1. a tumor in the right cerebral hemisphere



Origin of hemisphere

Middle English hemispere, from Latin hemisphaerium, from Greek hēmisphairion, from hēmi- + sphairion, diminutive of sphaira sphere


First Known Use: 14th century


HEMISPHERE Defined for Kids

hemisphere

play
noun hemi·sphere \ˈhe-mə-ˌsfir\

Definition of hemisphere

  1. 1 :  one of the halves of the earth as divided by the equator or by a meridian

  2. 2 :  a half of a sphere

  3. 3 :  either the left or the right half of the cerebrum

hemi·spher·ic \ˌhem-ə-ˈsfir-ik, -ˈsfer-\ or hemi·spher·i·cal \-ˈsfir-i-kəl, -ˈsfer-\ adjective



Medical Dictionary

hemisphere

play
noun hemi·sphere \-ˌsfi(ə)r\

Medical Definition of hemisphere

  1. :  half of a spherical structure or organ: asa:  cerebral hemisphereb:  either of the two lobes of the cerebellum of which one projects laterally and posteriorly from each side of the vermis





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