Definition of hemisphere
1a : a half of the celestial sphere as divided into two halves by the horizon (see horizon 1b), the celestial equator, or the eclipticb : half of a spherical or roughly spherical body (such as a planet); specifically : the northern or southern half of the earth as divided by the equator (see equator 2) or the eastern or western half as divided by a meridian (see meridian 4a(2)) affected by the weather in the other hemispherec : the inhabitants of a hemisphere of the Earth
5 : cerebral hemisphere an injury to the left hemisphere
Examples of hemisphere in a Sentence
a tumor in the right cerebral hemisphere
Recent Examples of hemisphere from the Web
Engineers say the Inuit, through trial and error, devised a design based on a parabola, not a semicircle, eliminating the forces that would make a true hemisphere bulge and collapse.
Mexico vs. Chile is the granddaddy of them all, at least in this hemisphere.
Though the northern hemisphere is currently awash in the warm and soothing winds of summer, and things mostly feel good right now, there is still some room for a little darkness, a few blue moods.
In recognition of the warmer weather in the northern hemisphere, this is an invitation to take some time, go outside, and set a kite aloft.
The Trump Administration is committed to making this initiative a pillar of its broader strategy to combat illegal immigration by creating conditions for shared security and economic growth across the hemisphere.
The other hemisphere of the menu includes salads, sandwiches, big burgers and a few entrées.
Mosquito season is heating up again in the northern hemisphere and the summer travel breaks start for many Americans.
Drawn by inexpensive living and quality healthcare, ex-pat seniors are changing the face of retirement in the hemisphere.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hemisphere'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Did You Know?
Hemisphere includes the prefix hemi-, meaning "half". The northern and southern hemispheres are divided by the equator, the circle halfway between Earth's two poles. The eastern and western hemispheres aren't divided so exactly, since there are no poles in the Earth's east-west dimension. Often the dividing line is said to be the "prime meridian"—the imaginary north-south line that runs through Greenwich, England, from which all longitude is calculated (itself being the 0° meridian). But for simplicity's sake, the eastern hemisphere is often said to include all of Europe, Africa, Australia, and Asia, while the western hemisphere contains North and South America and a great deal of ocean.
Origin and Etymology of hemisphere
Middle English hemispere, from Latin hemisphaerium, from Greek hēmisphairion, from hēmi- + sphairion, diminutive of sphaira sphere
First Known Use: 14th centurySee Words from the same year
HEMISPHERE Defined for English Language Learners
Definition of hemisphere for English Language Learners
: a half of the Earth
: half of a sphere : half of a round object
: either of the two halves of the brain
HEMISPHERE Defined for Kids
Definition of hemisphere for Students
1 : one of the halves of the earth as divided by the equator or by a meridian
2 : a half of a sphere
3 : either the left or the right half of the cerebrum
hemispheric\ˌhem-ə-ˈsfir-ik, -ˈsfer-\ or
hemispherical\-ˈsfir-i-kəl, -ˈsfer-\ adjective
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