thimerosal

noun

thi·​mer·​o·​sal thī-ˈmer-ə-ˌsal How to pronounce thimerosal (audio)
: a crystalline organic mercurial antiseptic C9H9HgNaO2S used especially for its antifungal and bacteriostatic properties

Examples of thimerosal in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The document allegedly found there was no link between the preservative thimerosal in flu vaccines and autism. Bymary Kekatos, ABC News, 10 July 2025 Vaccine panel on thimerosal: What is that and why is there controversy? Adrianna Rodriguez, USA Today, 7 July 2025 Before the votes at the meeting, Lyn Redwood, a nurse practitioner who has been involved with anti-vaccine organizations, presented on thimerosal in flu vaccines. Annika Kim Constantino,ashley Capoot, CNBC, 1 July 2025 In fact, her original presentation cited a non-existent study claiming harms from thimerosal. Judy Stone, Forbes.com, 30 June 2025 See All Example Sentences for thimerosal

Word History

Etymology

probably from thi- + mercury + -o- + salicylate

First Known Use

1949, in the meaning defined above

Time Traveler
The first known use of thimerosal was in 1949

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Cite this Entry

“Thimerosal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thimerosal. Accessed 22 Jul. 2025.

Medical Definition

thimerosal

noun
thi·​mer·​o·​sal thī-ˈmer-ə-ˌsal How to pronounce thimerosal (audio)
: a crystalline organic mercurial antiseptic C9H9HgNaO2S used especially for its antifungal and bacteriostatic properties see merthiolate

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