man ‧ do ‧ lin BrE AmE , mandoline /ˌmændəˈlɪn/ noun [countable]
[ Date: 1700-1800 ; Language: Italian ; Origin: mandolina , from mandola 'large type of mandolin' , from French mandore ]
a musical instrument with eight metal strings and a round back, played with a ↑ plectrum (=small piece of plastic, metal etc)