Prime Meridian

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Prime Meridian

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1. The meridian of longitude 0 degrees, used as the origin for measurement of longitude. The meridian of Greenwich, England, is almost universally used for this purpose. </dd>
2. Any meridian in any coordinate system used as an origin for measurement of longitude. [[/a>|/a> ]]

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use