Know how to use "fewer" and "less"? Find out.
1803, from French piano (18c.), Italian piano, shortened forms of pianoforte (q.v.). As an adverb, "softly," in musical directions (superlative pianissimo), attested from 1680s. Piano wire attested from 1831.
Spareribs, esp a single section of broiled spareribs: cornbread with a piano on a platter (1940s+ Black)