'Devitrify' definitions:

Definition of 'devitrify'

(from WordNet)
verb
Become crystalline
verb
Make (glassy materials) brittle or opaque

Definition of 'Devitrify'

From: GCIDE
  • Devitrify \De*vit"ri*fy\, v. t. To deprive of glasslike character; to take away vitreous luster and transparency from. [1913 Webster]