One of the mysteries of the English language finally explained.
1no object Of a (typically toxic) chemical: to bioaccumulate, thereby increasing in concentration; to become progressively concentrated in organisms further up the food chain, or in a specific environment, etc.
2with object Of an organism: to accumulate (a chemical), so that the concentration increases in its tissues. Compare "bioaccumulate", "biomagnify".
1970s; earliest use found in BioScience. From bio- + concentrate, after bioconcentration.
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