fusion
noun[L. fusio, from fundo, fusum.]
s as z.
fusion
The act or operation of melting or rendering fluid by heat, without the aid of a solvent; as the fusion of ice or of metals.
fusion
The state of being melted or dissolved by heat; a state of fluidity or flowing in consequence of heat; as metals in fusion. Watery fusion, the melting of certain crystals by heat in their own water of crystallization.