pianoforte
Concise Oxford English Dictionary © 2008 Oxford University Press:
pianoforte /pɪˌanəʊˈfɔːteɪ, -ˈfɔːti/
▶noun formal term for piano1.
– origin C18: from Ital., earlier piano e forte ‘soft and loud’, expressing the gradation in tone.
'pianoforte' also found in these Oxford entries:

