English

Noun
en-noun|sg= a blue moon

1. rare The moon tinted towards blue as it appears in the sky, caused by dust or smoke in the atmosphere.
2. archaic Something absurd.

#* 1528, Rede Me and Be Not Wrothe, pamphlet
#*: Yf they say the mone is belewe, we must believe that it is true.

1. obsolete The third full moon in a quarter that contains four rather than the usual three full moons.
2. idiom context|by extension A long time.

Etymology
Mistake in Sky & Telescope magazine in 1946, retracted nearly 60 years later.

Noun
wikipedia
a blue moon

1. The second of two full moons that occur in the same calendar month.

Derived terms
once in a blue moon

Category:Astronomy

• 2007-12-10 00:51 - Goldenrowley - idiom

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