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[bahy-oh-mag-nuh-fi-key-shuh n] /ˌbaɪ oʊˌmæg nə fɪˈkeɪ ʃən/
Origin of biomagnification
1970-75; bio- + magnification Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Contemporary definitions for biomagnification

the process by which the concentration of toxic substances increases in each successive link in the food chain; also called [biological magnification]

See biological magnification's 21st Century Lexicon
Copyright © 2003-2014, LLC
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biomagnification in Science
The increasing concentration of a substance, such as a toxic chemical, in the tissues of organisms at successively higher levels in a food chain. As a result of biomagnification, organisms at the top of the food chain generally suffer greater harm from a persistent toxin or pollutant than those at lower levels. Compare bioaccumulation.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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