1) An upright harpsichord 
A clavicytherium is a harpsichord in which the soundboard and strings are mounted vertically facing the player. The purpose of making a harpsichord vertical is the same as in the later upright piano, namely to save floor space. In a clavicytherium, the jacks move horizontally without the assistance of gravity, so that clavicytherium actions are mo...
a type of vertically strung harpsichord.[1 related articles]
an upright harpsichord.