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:
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.