Sentence:  ( 2 ) In the critical micelle region , there is a rapid agglomeration or polymerization to give the <WSD>micelles</WSD> , which have a degree of polymerization averaging around 60 - 80 . 
Meaning of the word marked with <WSD> tags:  an electrically charged particle built up from polymeric molecules or ions and occurring in certain colloidal electrolytic solutions like soaps and detergents