The Collaborative International Dictionary of English v.0.48:

Ferruminate \Fer*ru"mi*nate\, v. t. [L. ferruminatus, p. p. of
   ferruminare to cement, solder, fr. ferrumen cement, fr.
   ferrum iron.]
   To solder or unite, as metals. [R.] --Coleridge.
   [1913 Webster]