Col·li·quā'tion, n.
n. 1. The act of melting. When sand and ashes are well melted together and suffered to cool, there is generated, by the colliquation, that sort of concretion we call “glass.” Boyle.
Sense 2. (Med.) The progressive diminution of the solid parts of the animal system with copious excretions of liquids by one or more passages. [Obs.]