The Collaborative International Dictionary of English v.0.48:
Colliquation \Col`li*qua"tion\, n.
1. A melting together; the act of melting; fusion.
When sand and ashes are well melted together and
suffered to cool, there is generated, by the
colliquation, that sort of concretion we call
2. (Med.) A processive wasting or melting away of the solid
parts of the animal system with copious excretions of
liquids by one or more passages. [Obs.]