found: McGraw-Hill dict. of sci. tech. terms(prime meridian [GEOD] The meridian of longitude 0⁰, used as the origin for measurement of longitude; the meridian of Greenwich, England, is almost universally used for this purpose; longitude: Angular distance, along the Equator, between the meridian passing through a position and, usually, the meridian of Greenwich)
found: Amer. Herit. dict.(prime meridian: The zero meridian (0⁰), used as a reference line from which longitude east and west is measured. It passes through Greenwich, England.)
found: Web. 3(prime meridian: the meridian of 0 degrees longitude which runs through the original site of the Royal Observatory at Greenwich, England, and from which other longitudes are reckoned east and west around the world to 180 degrees)
found: Web. geog.(Prime Meridian)
notfound: Columbia gaz.
