El`i*qua"tion (?), n. [L. eliquatio, fr. eliquare to clarify, strain; e + liquare to make liquid, melt.] (Metallurgy) The process of separating a fusible substance from one less fusible, by means of a degree of heat sufficient to melt the one and not the other, as an alloy of copper and lead; liquation. Ure.