Lewis & Short

mercēdŭla, ae, f. dim. [1. merces].

  1. I. Small wages, poor pay (class.): infimi homines mercedula adducti, Cic. de Or. 1, 45, 198: isto modo nec medico quicquam debere te nisi mercedulam dicis nec praeceptori, Sen. Ben. 6, 15, 1.
  2. II. Hire, rent, income: constituere mercedulas praediorum, Cic. Att. 13, 11, 1.