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The accumulation of a substance, such as a toxic chemical, in various tissues of a living organism: the bioaccumulation of mercury in fish.

bi′o·ac·cu′mu·la′tive adj.
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References in periodicals archive ?
The egg microinjection method had already been used to characterize the adverse effects of known bioaccumulants such as ciguatoxin (a related polyether toxin also produced by a dinoflagellate) and the pesticide DDT in medaka fish.