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thimerosal

American  
[thahy-mur-uh-sal, -mer-] / θaɪˈmɜr əˌsæl, -ˈmɛr- /

noun

Pharmacology.
  1. a cream-colored, crystalline, water-soluble powder, C 9 H 9 HgNaO 2 S, used chiefly as an antiseptic.


thimerosal British  
/ θaɪˈmɛrəˌsæl /

noun

  1. a creamy white crystalline compound of mercury, used in solution as an antiseptic. Formula: C 9 H 9 HgNaO 2 S

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of thimerosal

1945–50; perhaps thi- + mer(cury) + -o- + sal(icylate)


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The new panel made its first decision last week, voting to stop recommending a small number of flu vaccines that still contain the preservative thimerosal, something Kennedy wrote a book about in 2015.

From BBC ● Jun. 30, 2025

Ethylmercury, the form of mercury in thimerosal, the researchers concluded, “seems to be eliminated from blood rapidly via the stools.”

From Los Angeles Times ● Jun. 29, 2025

Those treatments corresponded to a pet theory of the Geiers that autism stemmed from the interaction of mercury in thimerosal with testosterone, and therefore that reducing testosterone would address autism.

From Los Angeles Times ● Apr. 1, 2025

He questioned the safety of thimerosal, a common vaccine preservative, advancing the debunked claim it could lead to autism.

From Science Magazine ● Nov. 26, 2024

But a year or so later, Mr Kennedy wrote an article published in Rolling Stone magazine which repeated baseless claims that thimerosal was causing health problems.

From BBC ● Mar. 1, 2024

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