Webster's Revised Unabridged Dictionary · 1913

Ustulation

Ustulation , noun

[Compare French ustulation.]

1.
The act of burning or searing. [Rare] — Sir W. Petty
2.
(Old Chemistry) The operation of expelling one substance from another by heat, as sulphur or arsenic from ores, in a muffle.
3.
(a) (Pharmacy) The roasting or drying of moist substances so as prepare them for pulverizing.
(b)
(Pharmacy) The burning of wine.
4.
Lascivious passion; concupiscence. [Obsolete]
It is not certain that they took the better part when they chose ustulation before marriage, expressly against the apostle. — Jer. Taylor