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  1. Oxford American Dictionary

    sidereal month

    • IPA[sīˈdirēəl mənTH]
    • n.
      the time it takes the moon to orbit once around the earth with respect to the stars (approximately 271/4 days).

    • noun: sidereal month, plural noun: sidereal months

    • 更多解釋

    sidereal month

    • n.
      the time it takes the moon to orbit once around the earth with respect to the stars ...

    Oxford Dictionary