Wiktionary
baryton
n. (context music English) A string instrument related to the viol, employed in European music prior to the 1800s
Wikipedia
Baryton
The baryton is a bowed string instrument similar to the viol, but distinguished by an extra set of plucked strings. It was in regular use in Europe until the end of the 18th century.
Usage examples of "baryton".
In the catalogue of his works there are no fewer than 175 compositions for the instrument--namely, six duets for two barytons, twelve sonatas for baryton and violoncello, twelve divertimenti for two barytons and bass, and 125 divertimenti for baryton, viola and violoncello.