Definition of mean solar day in English:
The time between successive passages of the mean sun across the meridian.
- 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 dictionary
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