lunation

[ loo-ney-shuh n ]

/ luˈneɪ ʃən /

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

Origin of lunation

1350–1400; Middle English lunacyon < Medieval Latin lūnātiōn- (stem of lūnātiō). See Luna, -ation

And there is not the moon seen in all the lunation, save only the second quarter.

The Travels of Sir John Mandeville |John Mandeville
Now that lunation having commenced on the 3rd of December, and consisting of thirty days, will end on the 1st of January.

Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 |Various
The number 28 corresponds with the number of days in a lunation.

Chaucer's Works, Volume 5 (of 7) -- Notes to the Canterbury Tales |Geoffrey Chaucer
In fact, the year and the lunation are to one another very nearly in the proportion of 235 to 19.

Astronomical Myths |John F. Blake

So that in both these cases fever commenced in half a lunation after the contagion was received.

Zoonomia, Vol. II |Erasmus Darwin

lunation

/ (luːˈneɪʃən) /

another name for synodic month See month (def. 6)