blue moon
noun
1A phenomenon whereby the moon appears bluish owing to smoke or dust particles in the atmosphere: people saw blue moons for years after the 1883 eruption of Krakatoa
2A second full moon in a calendar month: tomorrow’s full moon is a blue moon [as modifier]: it can be no coincidence that July is a blue moon month
Phrases
once in a blue moon
- attachable
- attached
- attacher
- attachment
- attachment disorder
- attachment figure
- attachment of earnings
- attachment parenting
- attachment theory
- attaché
- attaché case
- attack
- attackable
- attack ad
- attack alarm
- attack code
- attack dog
- attacker
- attackman
- attagirl
- attain
- attainability
- attainable
- attainableness
- attainder