a piano that can play automatically when the keys are actuated electronically or by a pneumatic device controlled by a piano roll.
[ 1900-05, Amer. ]
a piano that can play automatically when the keys are actuated electronically or by a pneumatic device controlled by a piano roll.
[ 1900-05, Amer. ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012