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lunar day

a division of time that is equal to the elapsed time between two consecutive returns of the same terrestrial meridian to the moon.
Origin of lunar day
1680-90 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for lunar day
  • However, there's more: the amount of water detected changed over the month-long lunar day.
  • The tide ebbs and flows twice in each lunar day, or the space of a little more than twenty-four hours.
  • The situation gets interesting where the two sides meet at the terminator-the moving line between lunar day and night.

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