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concertina

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definition: 
A small musical instrument played by stretching and squeezing a central bellows between the hands to blow air over reeds, each note being sounded by a button.
sentence: 
All varieties of accordion (including the concertina and the bandoneon) have been made in both double and single-action models.
difficulty: 
hard
toefl frequency: 
1
toefl classification: