verb (used with object), tor·re·fied, tor·re·fy·ing.
to subject to fire or intense heat; parch, roast, or scorch.
Pharmacology. to dry or parch (drugs) with heat.
to roast, as metallic ores.
Origin of torrefy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for torrefaction
Historical Examples of torrefaction
Sulphur always renders an ore refractory; for, when it is expelled by torrefaction, the ore melts easily.
This torrefaction, to which the name of fusion may be given, requires great care and dexterity.
verb -fies, -fying or -fied
(tr) to dry (drugs, ores, etc) by subjection to intense heat; roast
Word Origin for torrefy
C17: from French torréfier, from Latin torrefacere, from torrēre to parch + facere to make
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012