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[meth-uh l-mur-kyuh-ree] /ˌmɛθ əlˈmɜr kyə ri/
noun, Chemistry
any of several extremely toxic organometallic compounds, Hg(CH 3) 2 , formed from metallic mercury by the action of microorganisms and capable of entering the food chain: used as seed disinfectants.
Origin of methylmercury
1915-20; methyl + mercury Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for methylmercury
  • It's no surprise that a chemical as potent as methylmercury harms wildlife when it enters an ecosystem in high concentration.
  • Once methylmercury enters streams, it is available for uptake at the base of the food web.

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