08596668-n:
the angular distance between a point on any meridian and the prime meridian at Greenwich
Glosses
(gloss)
08598823-n:
an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator
Glosses
(gloss)
08874703-n:
a borough of Greater London on the Thames; zero degrees of longitude runs through Greenwich; time is measured relative to Greenwich Mean Time