bioaccumulate Syllabification: (bi·o·ac·cu·mu·late)Pronunciation: /ˌbīōəˈkyo͞omyəˌlāt/Definition of bioaccumulate verb [no object] (of a substance) become concentrated inside the bodies of living things. Derivatives bioaccumulationPronunciation: /-ˌkyo͞omyəˈlāSHən/ noun bioaccumulate in other Oxford dictionaries Definition of bioaccumulate in the British & World English dictionary