lunar day

American  

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.

---

Etymology

Origin of lunar day

First recorded in 1680–90

Example Sentences

One lunar day is equivalent to four weeks on Earth, made up of two weeks of continual sunshine and two weeks of darkness.

From BBC

But when the "lunar day" returns in two Earth weeks' time, efforts will be made to revive Odysseus.

From BBC

But with the dawn of the lunar day, it appears that the probe has power.

From Seattle Times

Moon missions try to land early in the "lunar day", when the Sun comes up over the eastern horizon.

From BBC

This could mean that the danger would be hugely amplified because the transformation wouldn’t last a mere terrestrial night but an entire lunar day, which is two weeks in duration.

From Scientific American