This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A woman who is a ballet dancer.

n. A professional female dancer; a woman who dances at a public exhibition as in a ballet.

n. A female dancer; specifically, a ballet-dancer.

n. a female ballet dancer

"Petite danseuse de quatorze ans bronze with muslin skirt and satin hair ribbon with wooden base"

ballet dancer   

prima ballerina   

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