The name of the meridian that is labeled 0 is the Prime Meridian.
The meridian labeled zero is called the Prime Meridian. It is located at 0 degrees longitude and passes through Greenwich, England.
Prime or Greenwich.
The Grand Meridian
If there are any east-west lines printed on your map or globe, there should never be more than one. It may or may not be labeled "Equator".
Meridians east of the prime meridian are labeled with the letter E, which stands for east. The prime meridian itself is labeled as 0° longitude, and meridians to the east are assigned increasing positive longitude values.
Prime Meridian. 180 longitude is the Iinternational Date Line, and the equator is 0 degrees latitude
the prime meridian
scientist wanted a starting point that was labeled 0 degrees.
Greenwich, England
That would be the Prime Meridian.
The name of the 0 longitude is the Prime Meridian. It serves as the starting point for measuring longitude and separates the Eastern and Western Hemispheres.
Another name is Prime Meridian.