Sentence:  On the other hand , there are a few antithyroid drugs of this same general type , such as resorcinol , possessing <WSD>no</WSD> reducing activity and possibly acting through formation of a complex with molecular iodine . 
Meaning of the word marked with <WSD> tags:  quantifier; used with either mass nouns or plural count nouns for indicating a complete or almost complete lack or zero quantity of