from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To subject to intense heat; to parch, to roast.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To dry by a fire.
- transitive v. To subject to scorching heat, so as to drive off volatile ingredients; to roast, as ores.
- transitive v. To dry or parch, as drugs, on a metallic plate till they are friable, or are reduced to the state desired.
from The Century Dictionary and Cyclopedia
- To dry or parch with heat; roast.
- Specifically— In metallurgy, to roast or scorch, as metallic ores.
- In pharmacy, to dry or parch, as drugs, on a metallic plate till they become friable or are reduced to any state desired.
Latin torrefaciō. (Wiktionary)