mancipium

1 Roman law a (1) :  the status of a freeman subject to the power and control of the head of a Roman family similar to that of a slave except that he could not be abused or killed without legal cause (2) :  the power or control so exercised by such head of family over such freeman b :  a form of quiritarian as opposed to bonitarian ownership of property common in early Roman law c :  mancipation

2 :  slave