A storage place or repository for fans or fan-shaped objects; a specialized collection space.
From Latin flabellum (fan) plus -arium (place for), following the Latin pattern of creating nouns for storage spaces, similar to aquarium or vivarium.
Flabellarium is such a peculiar, rarely-used word that it demonstrates how Latin allows us to theoretically create new specialist terms, yet this one has almost no modern use except in academic discussions of classical terminology.
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