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词汇 mean solar day
释义

Definition of mean solar day in English:

mean solar day

noun
Astronomy

  • The time between successive passages of the mean sun across the meridian.

    〔天文〕平均太阳日，平太阳日

    Example sentencesExamples
    • It no longer made sense to define the second as 1 / 86,400th of a mean solar day.
    • The second was defined to be 1 / 86,400 of the mean solar day, the average rotational period of the earth with respect to the Sun.

Definition of mean solar day in US English:

mean solar day

noun
Astronomy

  • The time between successive passages of the mean sun across the meridian.

    〔天文〕平均太阳日，平太阳日

    Example sentencesExamples
    • It no longer made sense to define the second as 1 / 86,400th of a mean solar day.
    • The second was defined to be 1 / 86,400 of the mean solar day, the average rotational period of the earth with respect to the Sun.
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