noun
hemisphere
HEM-ih-sfeer/ˈhemɪsfɪr/
One of two halves into which a sphere is divided.
A plane through the sphere's center divides it into two hemispheres.
Etymology
The pieces mean “half a sphere,” first used for the celestial sphere. The same image was extended to half the Earth and to either of the brain’s two halves.
In context
The human brain contains two sides, the left hemisphere and the right hemisphere, right? And they are connected by a big bundle of fibers.
More examples
- The equator divides Earth into two hemispheres.
- The brain's left hemisphere helps control the body's right side.
- The mold forms the clay into a smooth hemisphere.
Forms
hemisphere · hemispheres
hemispherical adjective — Shaped like one half of a sphere.
Similar words
- half
- Half refers to either equal part of any whole.