Bass Guitar

Bass Guitar (aka Bass)
The Bass Guitar evolved from the Double Bass Cello as a more portable and a more easily amplified alternative for modern bands. The Ukulele Bass was developed as a smaller and even more portable alternative, rather than as a extension of the Ukulele family.

There is a full description of the Bass Guitar, including it's history in Wikipedia - Bass Guitar on Wikipedia Acoustic Bass Guitar on Wikipedia Extended Range Bass on Wikipedia Stick (electric upright) Bass on Wikipedia