Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun greenwich_meridian

1 sense of greenwich meridian

Sense 1
Greenwich Meridian -- (the meridian passing through Greenwich; was internationally adopted as the earth's zero of longitude in 1884)
       INSTANCE OF=> prime meridian -- (meridian at zero degree longitude from which east and west are reckoned (usually the Greenwich longitude in England))