Source : Webster's Revised Unabridged Dictionary (1913)

Questor \Ques"tor\, n. [L. quaestor, contr. fr. quaesitor, fr.
   quaerere, quaesitum, to seek for, ask: cf. F. questeur.]
   (Rom. Antiq.)
   An officer who had the management of the public treasure; a
   receiver of taxes, tribute, etc.; treasurer of state.
   [Written also {qu[ae]stor}.]

   Note: At an early period there were also public accusers
         styled questors, but the office was soon abolished.