Midchuck wrote: Wouldn't the proper plural be "plectra?"
Wikipedia says: "Plectrum" has both a Latin-based plural, plectra (from Greek plural πλήκτρα) and a native English plural, plectrums. Plectra is used in formal writing, particularly in discussing the harpsichord as an instrument of classical music. However, plectrums is more common in ordinary speech. In vernacular speech the abbreviation "pleck" or "plec" (plural: plecks) is sometimes used.