\pˌi͡ənəfˈɔːte͡ɪ], \pˌiənəfˈɔːteɪ], \p_ˌiə_n_ə_f_ˈɔː_t_eɪ]\
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By Princeton University
By DataStellar Co., Ltd
By James Champlin Fernald
n. [Italian] A keyed musical instrument, so called from the facility with which the performer can give a soft or strong expression to its tones. It consists of a series of wires of graduated length, thickness, and tension, struck by hammers moved by the notes on a keyboard, and inclosed in an ornamental work of mahogany, rose, walnut, or other polished wood. The strings are horizontal with the keyboard in the grand and square pianos; and perpendicular into upright or cottage.