The Eastern Hemisphere is a geographical term for the half of the earth that is east of the prime meridian (which crosses Greenwich, England) and west of the antimeridian on the opposite side of the planet. It is also used to refer to Europe, Asia, Africa, and Australia, in contrast with the Western Hemisphere, which includes North and South America). This hemisphere may also be called the "Oriental Hemisphere". In addition, it may be used in a cultural or geopolitical sense as a synonym for the "Old World".