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  1. Oxford American Dictionary

    sea mile

    • IPA[ˈsē ˌmīl]

    美式

    • n.
      a unit of distance equal to a minute of arc of a great circle and varying (because the earth is not a perfect sphere) between approximately 2,014 yards (1,842 meters) at the equator and 2,035 yards (1,861 meters) at the pole.

    • noun: sea mile, plural noun: sea miles