lunar day

noun
1.
a division of time that is equal to the elapsed time between two consecutive returns of the same terrestrial meridian to the moon.
Origin
1680-90
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.