Well my 2 cents, - an arpeggio does not requrie the chord to be voiced in a specific order. Chord inversions can also be arpeggiated. Think, "House of the Raising Sun" famous for its arpeggiated playing and those codes do not voice 1, 3, 5.

ar·peg·gi·o (är-pj-, -pj)
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