pianoforte

{ } n. [ It. piano soft (fr. L. planus even, smooth; see Plain, a.) + It. forte strong, fr. L. fortis (see Fort). ] (Mus.) A well-known musical instrument somewhat resembling the harpsichord, and consisting of a series of wires of graduated length, thickness, and tension, struck by hammers moved by keys. [ 1913 Webster ]

Dumb piano. See Digitorium. --
Grand piano. See under Grand. --
Square piano, one with a horizontal frame and an oblong case. --
Upright piano, one with an upright frame and vertical wires. [ 1913 Webster ]