The Collaborative International Dictionary of English v.0.48:

Vermination \Ver`mi*na"tion\, n. [L. verminatio the worms, a
   disease of animals, a crawling, itching pain.]
   1. The generation or breeding of vermin. --Derham.
      [1913 Webster]

   2. A griping of the bowels.
      [1913 Webster]