Torrefaction
TORREFAC'TION, noun [Latin torrefacio; torridus and facio.]
1. The operation of drying by a fire.
2. In metallurgy, the operation of roasting ores.
3. In pharmacy, the drying or roasting of drugs on a metalline plate, placed over or before coals of fire, till they become friable to the fingers, or till some other desired effect is produced.