1
- a small musical instrument, typically polygonal in form, played by stretching and squeezing between the hands to work a central bellows which blows air over reeds, each note being sounded by a button.六角形手风琴。比较ACCORDION.
1.1
- as modifier opening or closing in multiple folds多重折叠的：
concertina doors.
折叠门。
(concertinas, concertinaed或concertina'd, concertinaing)with obj.
- extend, compress, or collapse in folds like those of a concertina使伸展（或压缩、折叠）成褶皱状：
as adj. concertinaed big rolls of concertinaed wire大卷的折叠金属丝
figurative 〈喻〉a request that the negotiations be concertinaed into a week-long session.
把谈判时间压缩到一周的要求。
词源
mid 19th cent.: from CONCERT+-INA.