Sentence:  "Sanguinarina", as procured from the sulphate, is a yellowish gray powder without odor, and almost without taste. A slight <WSD>acrimonious</WSD> impression is developed after a time upon the tongue from the partial solubility of the alkaloid in saliva. 
Meaning of the word marked with <WSD> tags:  Harsh and sharp, or bitter and not pleasant to the taste; acrid, pungent.