The Collaborative International Dictionary
Torrefying
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.]
To dry by a fire.
--Sir T. Browne.(Metal.) To subject to scorching heat, so as to drive off volatile ingredients; to roast, as ores.
(Pharm.) To dry or parch, as drugs, on a metallic plate till they are friable, or are reduced to the state desired.
Wiktionary
torrefying
vb. (present participle of torrefy English)