Sentence:  Two absorptions of * * f with ethyl acetate or two absorptions of * * f ( which had been passed through Dowex-2-chloride ) , NS and * * f with crown gall tissue powder , or mouse liver powder did not further improve the <WSD>specificity</WSD> of staining . 
Meaning of the word marked with <WSD> tags:  the quality of being specific rather than general