Greenwich, UK.
(Also don't forget about France, Spain, Algeria, Mali,
Burkina Faso, Togo, Ghana, and Antarctica.)
The Equator
Longitude is the best term, but sometimes meridian is used. The line of longitude at zero degrees is the Prime Meridian.
The meridian of longitude at zero degrees (which passes through Greenwich, England) is known as the Prime Meridian.
The Prime Meridian is at zero degrees longitude.
The longitude of every point on the Prime Meridian is zero.
The Prime Meridian is the invisible line at zero longitude
Longitude is the best term, but sometimes meridian is used. The line of longitude at zero degrees is the Prime Meridian.
The Prime Meridian
The meridian of longitude at zero degrees (which passes through Greenwich, England) is known as the Prime Meridian.
All the points on Earth with zero longitude go together to form the imaginary line called the "Prime Meridian".
Prime Meridan
Prime Meridan
It's called "zero longitude". If you mark a dot on your globe at a few hundred points that all have zero longitude, they form a line between the north and south poles that passes through Greenwich, UK, called the "Prime Meridian".
The 0' line of longitude is called the Greenwich Meridian because it passes through Greenwich, Lonon
The so-called 'lines' of longitude are also called 'meridians'. The Prime Meridian is a line of longitude. It's the line made out of all the points on Earth whose longitude is zero.
The Prime Meridian is at zero degrees longitude.
The Prime Meridian is the invisible line at zero longitude
The longitude of every point on the Prime Meridian is zero.