verb (used with object), de·vit·ri·fied, de·vit·ri·fy·ing.
verb (used without object), de·vit·ri·fied, de·vit·ri·fy·ing.
Examples from the Web for devitrify
Bad soda-glass or that which has been kept for many years, tends to devitrify when worked.A Handbook of Laboratory Glass-Blowing|Bernard D. Bolas
Hard glass, which contains much calcium, is more apt to devitrify than the more fusible varieties.
It was mentioned in the last chapter that a glaze free from alumina will devitrify or become dull.The Potter's Craft|Charles F. Binns
If either of these precautions are neglected most glass will devitrify badly.