n. The act or process of devitrifying, or the state of being devitrified. Specifically, the conversion of molten glassy matter into a stony mass by slow cooling, the result being the formation of crystallites, microbites, etc., in the glassy base, which are then called devitrification products. [ 1913 Webster ]
n.
n. [ See Vitrify. ] Same as Vitrifaction. Sir T. Browne. Ure. [ 1913 Webster ]