Sentence:  On the other hand , there are a few antithyroid drugs of this same general type , such as resorcinol , possessing no reducing activity and possibly acting through formation of a complex with molecular <WSD>iodine</WSD> . 
Meaning of the word marked with <WSD> tags:  a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks)