meridian
US /məˈrɪd.i.ən/
UK /məˈrɪd.i.ən/

1.
meridiano
a circle of constant longitude passing through a given place on the earth's surface and the terrestrial poles
:
•
The Prime Meridian passes through Greenwich, London.
Il meridiano principale passa per Greenwich, Londra.
•
Navigators use meridians to determine longitude.
I navigatori usano i meridiani per determinare la longitudine.