Prime Me.rid.i.an /ˌ..ˈ.../ BrE AmE
the imaginary line drawn from north to south on the earth, from which east and west are measured in degrees on a map
Prime Me.rid.i.an /ˌ..ˈ.../ BrE AmE
the imaginary line drawn from north to south on the earth, from which east and west are measured in degrees on a map
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012