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moon phases is not in our dictionary (yet). Here's what it could mean:

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noun

  • The different shapes of the Moon's directly sunlit portion as seen from Earth, which follow a regular cycle of approximately 29.5 days.

Example Sentences

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

The timepiece includes moon phases, an alarm and thermometer and was described as "one of the world's most complicated vintage pocket watches ever made".

From BBC • Nov. 17, 2025

The marine bristle worm Platynereis dumerilii, for example, employs a special Cry protein designated L-Cry to distinguish between sunlight and moonlight as well as between different moon phases.

From Science Daily • Nov. 13, 2023

Thesaurus

Possible Synonyms

  • cycle of the moon
  • lunar phases
  • stages of the moon
  • lunar appearances
  • lunation

Possible Antonyms

  • solar stasis
  • lunar standstill

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