prime meridian
another name for a line of longitude is meridian.
The name of the line that has 0 longitude is the prime meridian
A "meridian" is a line of constant longitude.
Another name for a line of longitude is "meridian."
They're often referred to as "meridians" of longitude.
The imaginary line running through Greenwich, England at 0 degrees longitude is called the Prime Meridian. It marks the starting point for measuring longitude and defines the Eastern and Western Hemispheres.
longitude
another name for a line of longitude is meridian.
Every 'line' of constant longitude is a 'meridian'.
A Meridian (I Think)
No. 90 degrees longitude is not a major line of longitude. Only 0 and 180 degrees longitude, which are the Greenwich Meridian and the International Date Line respectively, are major lines of longitude.
The equator or any line of longitude or meridian.