VIOLONCELLI

Noun

violoncelli

plural of violoncello

Source: Wiktionary

VIOLONCELLO

Vi`o*lon*cel"lo, n. Etym: [It. violoncello, dim. of violone a bass viol. See Violone.] (Mus.)

Definition: A stringed instrument of music; a bass viol of four strings, or a bass violin with long, large strings, giving sounds an octave lower than the viola, or tenor or alto violin.

Source: Webster’s Unabridged Dictionary 1913 Edition