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moon phases

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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

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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

Solar and lunar eclipses — which happen during the new moon and full moon phases, respectively — always come in pairs.

From Seattle Times Apr. 3, 2024

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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