What does "ustulation" mean?

Ustulation: (Old Chem.) The operation of expelling one substance from another by heat, as sulphur or arsenic from ores, in a muffle.

Additional senses

  1. 2.(Pharm.) (a) The roasting or drying of moist substances so as prepare them for pulverizing. (b) The burning of wine.
  2. 3.Lascivious passion; concupiscence. [Obs.] It is not certain that they took the better part when they chose ustulation before marriage, expressly against the apostle. Jer. Taylor.

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