HyperDic: prime_meridian

English > 1 sense of the expression prime meridian:
NOUNlocationprime meridianmeridian at zero degree longitude from which east and west are reckoned (usually the Greenwich longitude in England)
English > prime meridian: 1 sense > noun 1, location
Meaningmeridian at zero degree longitude from which east and west are reckoned (usually the Greenwich longitude in England).
InstancesGreenwich MeridianThe meridian passing through Greenwich
Broadermeridian, line of longitudeAn imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator

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