Fusion, n.
Etymology: [L. fusio, fr. fundere, fusum to pour, melt: cf. F. fusion. See Fuse, v. t., aud cf, Foison.]
1. The act or operation of melting or rendering fluid by heat; the act of melting together; as, the fusion of metals.
2. The state of being melted or dissolved by heat; a state of fluidity or flowing in consequence of heat; as, metals in fusion.
3. The union or blending together of things, as, melted together. The universal fusion of races, languages, and customs . . . had produced a corresponding fusion of creeds. C. Kingsley. Watery fusion (Chem.) the melting of certain crystals by heat in their own water of crystallization.
4. (Biol.)
1 more senses
The union, or binding together, of adjacent parts or tissues.