Definition of Blue hole

1. Noun. A submarine cave or sinkhole, a roughly circular, steep-walled depression that is typically anoxic below a certain depth. ¹

¹ Source:

Blue Hole Pictures

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Lexicographical Neighbors of Blue Hole

blue fox
blue foxes
blue funk
blue giant
blue giants
blue goose
blue grama
blue green
blue greens
blue gum
blue gums
blue heeler
blue heelers
blue hen-hawk
blue hole (current term)
blue holes
blue hour
blue hours
blue jack
blue jasmine
blue jay
blue jean
blue jeans
blue jessamine
blue jets
blue joke
blue law
blue laws
blue line

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