THEORBO
Etymology
Noun
theorbo (plural theorbos or theorboes)
(musical instruments) A baroque, double-necked lute having an extra set of open bass strings.
Synonyms
• chitarrone
Source: Wiktionary
The*or"bo, n. Etym: [F. théorbe, téorbe, formerly tuorbe, tiorbe, It.
tiorba.] (Mus.)
Definition: An instrument made like large lute, but having two necks, with
two sets of pegs, the lower set holding the strings governed by
frets, while to the upper set were attached the long bass strings
used as open notes.
Note: A larger form of theorbo was also called the archlute, and was
used chiefly, if not only, as an accompaniment to the voice. Both
have long fallen into disuse.
Source: Webster’s Unabridged Dictionary 1913 Edition