Noah Webster
Vitrify
VIT'RIFY, verb transitive [Latin vitrum, glass, and facio, to make.]
To convert into glass by fusion or the action of heat; as, to vitrify sand and alkaline salts.
VIT'RIFY, verb intransitive To become glass; to be converted into glass.
Chimists make vessels of animal substances calcined, which will not vitrify in the fire.