The term CELLO PARTS can be broken down into two crossword solutions, PEGS (4 letters) and BOW (3 letters). PEGS refers to the four pegs located at the top of the cello, which are used to tune the instrument. The BOW is the long stick with horsehair that is used to draw sound from the strings of the cello. Both the pegs and the BOW are essential components of the cello and are necessary for playing the instrument.