Definition of Meridian:
A Meridian is an imaginary line that runs on the Earth’s surface and passes through both geographical poles. It is an important component in the grid system of longitude and latitude, and divides the Earth into the eastern and western hemispheres. A Meridian represents a full circle of 360°, and is used as a reference point to determine time zones and to navigate through the use of GPS. The Meridian is also commonly known as the prime meridian, which is a fixed line that passes through the Royal Observatory in Greenwich, England and is used as the starting point for measuring longitude. The concept of the Meridian has had great significance throughout history, playing a crucial role in precise scientific measurements, navigation methods, and map-making practices.
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