Толковый словарь английского языка Oxford English Reference - concertina

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). Etymology: concert + -ina CONCERTINO n. (pl. -os) Mus. 1 a simple or short concerto. 2 a solo instrument or solo instruments playing in a concerto. Etymology: It., dimin. of concerto