Simple past tense and past participle of vitrify.(verb)
Converted into glass(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "vitrified" in a sentence
"This is possible because the cells are not fixed with chemical reagents, but are vitrified - in other words they are frozen so fast that the water inside them does not have time to crystallise, and remains in solid state."
"The most curious circumstance attending it is, that the stones are all firmly connected together by a kind of vitrified matter, like lava, or like the stay or scoriæ of an iron-foundry, and the stones themselves, in many places, have been softened and vitrified."
"But at the moment, there is no final resting place for these "vitrified" wastes."