polymerization
po.ly.mer.iza.tion \p*-.lim-*-r*-'za--sh*n, .pa:l-*-m*-r*-\ n [ISV] 1: a chemical reaction in which two or more small molecules combine to form larger molecules; broadly : ASSOCIATION 2: reduplication of parts in an organism
Webster's English Dictionarypo.ly.mer.iza.tion \p*-.lim-*-r*-'za--sh*n, .pa:l-*-m*-r*-\ n [ISV] 1: a chemical reaction in which two or more small molecules combine to form larger molecules; broadly : ASSOCIATION 2: reduplication of parts in an organism