Definition

1. Noun:
   • Half of a sphere: A hemisphere is one of two equal halves of a sphere, created by a plane passing through its center.
   • Half of the terrestrial globe: In geography, a hemisphere refers to one half of the Earth, typically divided by the equator (Northern/Southern) or by meridians (Eastern/Western).
   • Either half of the cerebrum: In anatomy, a hemisphere is one of the two halves (left or right) of the brain.

Examples

• Half of a sphere:
  • The architect designed a dome that was a perfect hemisphere.
  • Cut the orange in half; each piece is a hemisphere.
• Half of the terrestrial globe:
  • Australia is located in the Southern Hemisphere.
  • Most of Europe lies in the Northern Hemisphere.
• Either half of the cerebrum:
  • The left hemisphere of the brain is often associated with language and logic.
  • The stroke affected the motor functions in her right cerebral hemisphere.

Advanced Usage

• "In the hemisphere of": Used to describe being within a particular half of a sphere or domain.
  • The ancient civilization flourished in the hemisphere of the Mediterranean.
• "To dominate a hemisphere": To be the primary or controlling force in a particular half of the world.
  • The empire sought to dominate the entire Eastern Hemisphere.

Variants and Related Words

• Hemispheric (adj): Relating to or shaped like a hemisphere.
  • The hemispheric dome was an impressive sight.
• Hemispherical (adj): Having the shape of a hemisphere.
  • They lived in a hemispherical hut.
• Cerebral hemisphere (n): A specific term for either half of the cerebrum.
  • The corpus callosum connects the two cerebral hemispheres.

Synonyms

• Half-sphere: A direct synonym for half of a sphere.
• Half-globe: Often used poetically or descriptively for a terrestrial hemisphere.
• Bisected sphere: Emphasizes the sphere being cut into two equal parts.

Related Phrases

• Northern/Southern Hemisphere: The halves of Earth north and south of the equator.
  • Penguins are native to the Southern Hemisphere.
• Eastern/Western Hemisphere: The halves of Earth divided by the Prime Meridian and 180th meridian.
  • Japan is in the Eastern Hemisphere.
• Left/Right hemisphere: Refers specifically to the halves of the brain.
  • The right hemisphere is key for spatial reasoning.

Noun

1. either half of the cerebrum
2. half of a sphere
3. half of the terrestrial globe