Sentence:  The walls of the stomach are lined with a nerve-interwoven delicat membrane, which suffers from scalding fluids as much as any other tegumental tissues of the body, and by daily <WSD>torrefactions</WSD> becomes either callous or chronically inflamed, and in either case less fit for the performance of its important functions. 
Meaning of the word marked with <WSD> tags:  The act or process of subjecting something to heat or to highly acidic substances.