The Collaborative International Dictionary of English v.0.48:

Fuse \Fuse\, v. i.
   1. To be reduced from a solid to a fluid state by heat; to be
      melted; to melt.
      [1913 Webster]

   2. To be blended, as if melted together.
      [1913 Webster]

   Fusing point, the degree of temperature at which a
      substance melts; the point of fusion; the melting point.
      [1913 Webster]