hemisphere

A hemisphere is half of a sphere. If it’s a cold winter in the northern hemisphere, take a winter getaway to sunbathe somewhere in the southern hemisphere.

Hemisphere comes from the Greek, and combines the prefix hemi-, for "half," with sphere, or "perfectly round ball." We talk about the earth as divided at the equator into the northern and southern hemispheres (or divided at the prime meridian into eastern and western hemispheres). In biology, there are two cerebral, or brain, hemispheres — also known as the right and left sides of the brain.

Definitions of hemisphere
  1. noun
    half of a sphere
    see moresee less
    type of:
    subfigure
    a figure that is a part of another figure
  2. noun
    half of the terrestrial globe
    see moresee less
    examples:
    northern hemisphere
    the hemisphere that is to the north of the equator
    southern hemisphere
    the hemisphere to the south of the equator
    types:
    eastern hemisphere, orient
    the hemisphere that includes Eurasia and Africa and Australia
    New World, occident, western hemisphere
    the hemisphere that includes North America and South America
    type of:
    geographic area, geographic region, geographical area, geographical region
    a demarcated area of the Earth
  3. noun
    either half of the cerebrum
    synonyms: cerebral hemisphere
    see moresee less
    types:
    left brain, left hemisphere
    the cerebral hemisphere to the left of the corpus callosum that controls the right half of the body
    right brain, right hemisphere
    the cerebral hemisphere to the right of the corpus callosum that controls the left half of the body
    type of:
    neural structure
    a structure that is part of the nervous system
Word Family
EDITOR’S CHOICE

Test prep from the experts

Boost your test score with programs developed by Vocabulary.com’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.

SAT/PSAT

$29.95
  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week

TOEFL

$29.95
  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week