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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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

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

From BBC Jan. 22, 2024

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 Oct. 27, 2023

Isro added that it hoped they would reawaken "around 22 September" when the next lunar day starts.

From BBC Sep. 4, 2023

The Chandrayaan-3 lander and rover were expected to operate only for one lunar day, which is equal to 14 days on Earth.

From Seattle Times Sep. 2, 2023

Because of the length of the lunar day and night Kepler described “the great intemperateness of climate and the most violent alternation of extreme heat and cold on the Moon,” which is entirely correct.

From "Cosmos" by Carl Sagan

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