Definition: Comme à la harpe, which means “like a harp,” indicates that a chord’s notes are to be played quickly in order (not simultaneously), and are usually played from lowest to highest; this produces a type of broken chord. See arpeggiato.
By Brandy Kraemer, About.com Guide
Arpeggio is based on the Italian word arpa, meaning "harp."Image © Brandy Kraemer