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prime meridian

noun

Definition of prime meridian

: the meridian of 0 degrees longitude which runs through the original site of the Royal Observatory at Greenwich, England, and from which other longitudes are reckoned

Examples of prime meridian in a Sentence

Recent Examples on the Web

 Longitude measure distances from the prime meridian. — Caroline Picard, Good Housekeeping, "Can You Score an A+ On This 5th Grade Geography Test?," 31 Aug. 2018

First Known Use of prime meridian

1884, in the meaning defined above

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