Source : Webster's Revised Unabridged Dictionary (1913)

Usurarious \U`su*ra"ri*ous\, Usurary \U"su*ra*ry\, a. [L.
   usurarius that serves for use, that pays interest. See
   {Usurer}.]
   Usurious. [Obs.] ``Usurarious contracts.'' --Jer. Taylor. Bp.
   Hall.