Any musical instrument that produces sound by the vibrations of strings.
The strings may be of gut, metal, fibre, or plastic, and may be plucked, bowed, or struck. The orchestral stringed instruments include the violin , viola , cello , double bass , and harp . Keyboard stringed instruments include the clavichord , harpsichord , piano , and virginal . See also Aeolian harp ; balalaika ; dulcimer ; guitar ; kithara ; koto ; lute ; lyre ; mandolin ; pipa ; sitar ; 016B; d ; ukulele ; viol ; zither .