Western Hemisphere

Definition

The Western Hemisphere 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.

Related terms

Eastern Hemisphere: This is everything on the other side of that imaginary pizza-cutting line - east of Greenwich and west of its opposite point.

Equator: An imaginary line drawn around the middle of Earth, equally distant from both poles. Like wearing a belt in middle position on your waist.

Prime Meridian: The earth's zero degrees longitude line, passing through Greenwich in London. It’s like drawing a vertical line down at center in your pizza to divide it into two equal halves.