Source : Webster's Revised Unabridged Dictionary (1913)

Usurer \U"su*rer\, n. [F. usurier, LL. usurarius. See {Usury},
   and cf. {Usurarious}.]
   1. One who lends money and takes interest for it; a money
      lender. [Obs.]

            If thou lend money to any of my people that is poor
            by thee, thou shalt not be to him as a usurer,
            neither shalt thou lay upon him usury. --Ex. xxii.
                                                  25.

   2. One who lends money at a rate of interest beyond that
      established by law; one who exacts an exorbitant rate of
      interest for the use of money.

            He was wont to call me usurer.        --Shak.

Source : WordNet®

usurer
     n : someone who lends money at excessive rates of interest [syn:
          {loan shark}, {moneylender}, {shylock}]