Noun
mandocello (plural mandocellos)
(music) A string instrument similar to a large mandolin
19th abd 20th Century laoutos The Greek laouto or laghouto (long-necked lute) is similar to a mandocello, ordinarily tuned C3/C2-G3/G2-D3/D3-A3/A3 with half of each pair of the lower two courses being tuned an octave high on a lighter gauge string. Source: Internet
Mandolin family From top left, clockwise: 1920 Gibson F-4 mandolin, 1917 Gibson H-2 mandola, 1929 Gibson mando-bass, and 1924 Gibson K-4 mandocello from Gregg Miner's collection. Source: Internet
It's normally tuned C2-G2-D3-A3, one octave below the tenor banjo like the cello and mandocello. Source: Internet