Question

what is difference between prime merdian and merdian?​

Answer 1

Answer:

a merdian is an imaginatory line which is from North Pole to South Pole

a prime meridian is a 0 degree meridian it is also called as Greenwich longitude

Answer 2

Answer:

Prime meridian is defined as a imaginary line which divides earth into two hemispheres estward and westward like equator in short,prime meridian denotes the 0°longitude.

And, Greenwich is name of place in london, UK through which prime meridian passes and that is why in present time prime meridian is also known as Greenwich meridian.