USTULA'TION, n. [L. ustulatus.] 1. The act of burning or searing.2. In metallurgy, ustulation is the operation of expelling one substance from another by heat, as sulphur and arsenic from ores, in a muffle.3. In pharmacy, the roasting or drying of moist substances so as to prepare them for pulverizing; also, the burning of wine.
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