ˌRoyal ˌGreenwich Obˈservatory, the
the British national observatory (=a place where scientists study the stars), which was established in the 17th century, in Greenwich, South London. After World War II the observatory moved to Cambridge, but it closed in 1998. The 0°meridian (=an imaginary line that divides the east part of the world from the west) passes through the building in Greenwich, which is now part of the National Maritime Museum. ⇒ Greenwich Mean Time

[TahlilGaran] Dictionary of Contemporary English ▲