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Word of the Day
Thursday, December 29, 2016

Definitions for lunation

  1. the period of time from one new moon to the next (about 29½ days); a lunar month.

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Citations for lunation
After that we'll have to wait for the next lunation--that is, for four weeks. Arthur C. Clarke, Prelude to Space, 1953
The prominence of seven as a sacred number among ancient peoples is due to the moon. Each lunation has four phases or quarters, averaging about seven days apiece. , "Fragments of Science: The Moon and the Sabbath," Popular Science Monthly, December 1897
Origin of lunation
1350-1400
Lunation comes from Middle English lunacyon, lunacioun, which in turn comes from Medieval Latin lunation-, the stem of the noun lūnatiō, a derivative of Latin lūna meaning "moon." The word entered English at the end of the 1300s.