banjo

Concise Oxford English Dictionary © 2008 Oxford University Press:
banjo/ˈbanʤəʊ/

▶noun (pl. banjos or banjoes) a stringed instrument of the guitar family, with a round open-backed soundbox of parchment stretched over a metal hoop.

– derivatives
banjoist noun.

– origin C18: orig. a black Amer. alt. of bandore (see bandora).