Western Hemisphere
Western Hemisphere
The Western Hemisphere (/ˈwɛstərn ˈhɛmɪsfɪər/; from Greek hēmisphairion, from hēmi, "half" + sphaira, "sphere") is a geographical term for the half of Earth which lies west of the prime meridian (which crosses Greenwich, London) and east of the antimeridian. The other half is called the Eastern Hemisphere.
Etymology
The term "Western Hemisphere" is derived from the Greek word hēmisphairion, which is a combination of hēmi, meaning "half", and sphaira, meaning "sphere". This term is used to describe the half of the Earth that lies west of the prime meridian and east of the antimeridian.
Related Terms
- Geography: The study of physical features of the earth and its atmosphere, and of human activity as it affects and is affected by these.
- Prime Meridian: The meridian (line of longitude) at which the longitude is defined to be 0°.
- Antimeridian: The meridian 180° east or west of the prime meridian with which it forms a great circle dividing the earth into the eastern and western hemispheres.
- Eastern Hemisphere: The half of Earth which is east of the prime meridian (and west of the antimeridian).
See Also
External links
- Medical encyclopedia article on Western Hemisphere
- Wikipedia's article - Western Hemisphere
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