FU'SION, n. s as z. [L. fusio, from fundo, fusum.]
1. 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.
2. 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.
