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prime meridian

1 of 1noun
/ˈpɹaɪm məˈɹɪdiən/
Forms:prime meridians
1

an imaginary line that goes from the North Pole to the South Pole, which helps to measure how far east or west a place is on Earth

  • The prime meridian is crucial for global navigation and timekeeping.
  • Greenwich Mean Time is based on the prime meridian.
  • He stood with one foot on each side of the prime meridian.
  • The prime meridian divides the eastern and western hemispheres.
  • They calculated their position relative to the prime meridian.