最終更新日：2024/07/28

The reference line at 0° longitude, passing through Greenwich, England, from which longitude east and west is measured.

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prime meridian

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prime meridian

noun

The reference line at 0° longitude, passing through Greenwich, England, from which longitude east and west is measured.

The prime meridian is the reference line at 0° longitude.

意味（1）

The reference line at 0° longitude, passing through Greenwich, England, from which longitude east and west is measured.

Coordinate term: antimeridian