Vitrify
Vitrify , transitive verb
[French vitrifier; Latin vitrum glass + -ficare to make. See Vitreous, -fy.]
To convert into, or cause to resemble, glass or a glassy substance, by heat and fusion.
Vitrify , transitive verb
To become glass; to be converted into glass.
Chymists make vessels of animal substances, calcined, which will not vitrify in the fire.