SE´XTULA the sixth part of the uncia, was the smallest denomination of money in use among
the Romans (Varro, L. L. 5.171). It was also applied, like
the uncia, to other kinds of magnitude. [UNCIA]
A Dictionary of Greek and Roman Antiquities. William Smith, LLD. William Wayte. G. E. Marindin. Albemarle Street, London. John Murray. 1890.