ar·peg·gi·o 
(är-pĕjē-ō′, -pĕjō)
(är-pĕjē-ō′, -pĕjō)n. pl. ar·peg·gi·os
1. The sounding of the tones of a chord in rapid succession rather than simultaneously.
2. A chord played or sung in this manner.
[Italian, from arpeggiare, to play the harp, from arpa, harp, of Germanic origin; see HARP.]