Английский разговорный словарь (основной) - concertina

ˌkɔnsəˈti:nə n. & v. --n. a musical instrument held in the hands and stretched and squeezed like bellows, having reeds and a set of buttons at each end to control the valves. --v.tr. & intr. (concertinas, concertinaed or concertina'd, concertinaing) compress or collapse in folds like those of a concertina (the car concertinaed into the bridge). [concert + -ina]