CONCERTINA
- to fold up like a pair of bellows [v CONCERTINAED, CONCERTINAING, CONCERTINAS]
- to collapse in folds [v CONCERTINAED, CONCERTINAING, CONCERTINAS]
- Opening or closing in multiple folds
- A small musical instrument, typically polygonal in form, played by stretching and squeezing between the hands, to work a central bellows that blows air over reeds, each note being sounded by a button
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