What is "ustulation"

Ustulation \Us`tu*la"tion\, n. [Cf. F. ustulation.]

1. The act of burning or searing. [R.]
   --Sir W. Petty.

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

3. (Pharm.)

   1. The roasting or drying of moist substances so as prepare them for pulverizing.

   2. The burning of wine.

4. 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.

n. the action or fact of burning, especially roasting