Definition of "methylmercury" [methylmercury]

• The organometallic cation CH3Hg+; it is a toxicant that accumulates in the environment in the form of various compounds (noun)

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• "When these mercury particles reach water, microorganisms consume them, transforming the particles to a highly toxic form of mercury called methylmercury , that can contaminate fish."
• "The Centers for Disease Control and Prevention calls methylmercury one of the nation's most serious hazardous waste problems and says it is a possible carcinogen."
• "When airborne mercury reaches water, it can change to the toxic methylmercury, which is found in tainted fish."