Noun
A musical instrument, most often with four strings, resembling a small banjo but tuned like a mandolin.
Synonym of mandolin-banjo
Synonym of banjo-mandolin
Source: en.wiktionary.orgBanjolin or mandolin-banjo The mandolin was given a banjo body in an 1882 patent by Benjamin Bradbury of Brooklyn and given the name banjolin by John Farris in 1885. Source: Internet