from
The Collaborative International Dictionary of English v.0.48
Torrefy \Tor"re*fy\, v. t. [imp. & p. p. {Torrefied}; p. pr. &
vb. n. {Torrefying}.] [L. torrere to parch + -fy: cf. F.
torr['e]fier, L. torrefacere.] [Written also {torrify}.]
1. To dry by a fire. --Sir T. Browne.
[1913 Webster]
2. (Metal.) To subject to scorching heat, so as to drive off
volatile ingredients; to roast, as ores.
[1913 Webster]
3. (Pharm.) To dry or parch, as drugs, on a metallic plate
till they are friable, or are reduced to the state
desired.
[1913 Webster]