concertina

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con·cer·ti·na / ˌkänsərˈtēnə/ • n. 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. ∎  [as adj.] opening or closing in multiple folds: concertina doors.• v. (-ti·nas, -ti·naed / -ˈtēnəd/ ) [tr.] extend, compress, or collapse in folds like those of a concertina: [as adj.] (concertinaed) concertinaed wire.

concertina

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