cello -
A large stringed instrument of the violin family with four strings.
Wikipedia
The cello is a bowed string instrument with four strings tuned in perfect fifths. It is a member of the violin family of music instruments, which also includes the violin, viola and the contrabass. The word derives from the Italian 'violoncello'.
OmegaWiki Dictionary
Ω
cello A stringed musical instrument and a member of the violin family.