The Collaborative International Dictionary
Vitrifying
Vitrify \Vit"ri*fy\, v. t. [imp. & p. p. Vitrified; p. pr. & vb. n. Vitrifying.] [F. vitrifier; L. vitrum glass + -ficare to make. See Vitreous, -fy.] To convert into, or cause to resemble, glass or a glassy substance, by heat and fusion.
Wiktionary
vitrifying
vb. (present participle of vitrify English)