Banjo players may find this amusing.
From:

Music Lover's Encyclopedia By:

Rupert Hughes and Deems Taylor

Copyright:

1903 by McClure Phillips & Company

Plectrum= A small bit of ivory, metal or shell for plucking the strings of mandolins etc.

Banjo=A long-necked stringed instrument with a broad, round body, covered with a tight skin, which gives the five to nine strings a quaint sound.