commissorius

commissōrĭus, a, um, adj. [committo]; Lex, in jurid. lang.,

• a clause in the condition of a sale or of a contract (by which a vendor reserved to himself the privilege of rescinding the sale if the purchaser did not pay his purchase-money at the time agreed on), Dig. 18, 3, 14.—So also absol.: com-missōrĭa, ae, f., Dig. 18, 3, 14; 43, 23, 11.

commissorius , (w. litterae) lettters of commission (leg.). c1204 tres litteras ~ias ‥ impetrans in registro pape ‥ poni fecit Gir. Opusc. I 398; 12‥ cum literis ~iis non esset inhibita appellacio Reg. S. Thom. Dublin 478; 1540 literas ~ias regis Conc. III 851.