thimerosal
noun
thi·mer·o·sal
thī-ˈmer-ə-ˌsal 
: 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
Most vaccines for measles, mumps and rubella do not contain thimerosal.
—
Matt Brown, Fortune, 10 Feb. 2026
Most vaccines for measles, mumps and rubella do not contain thimerosal.
—Arkansas Online, 9 Feb. 2026
In the human body, thimerosal gets metabolized to a compound known as ethylmercury, which is distinct to the more toxic methylmercury.
—Omer Awan, Forbes.com, 5 Feb. 2026
Why and where is thimerosal used?
—Gabrielle Emanuel, NPR, 30 Jan. 2026
See All Example Sentences for thimerosal
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Matt Brown, Fortune, 10 Feb. 2026
Most vaccines for measles, mumps and rubella do not contain thimerosal.
—Arkansas Online, 9 Feb. 2026
In the human body, thimerosal gets metabolized to a compound known as ethylmercury, which is distinct to the more toxic methylmercury.
—Omer Awan, Forbes.com, 5 Feb. 2026
Why and where is thimerosal used?
—Gabrielle Emanuel, NPR, 30 Jan. 2026
See All Example Sentences for thimerosal
Cite this Entry
“Thimerosal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thimerosal. Accessed 4 Apr. 2026.
Copy CitationMedical Definition
thimerosal
noun
thi·mer·o·sal
thī-ˈmer-ə-ˌsal
: a crystalline organic mercurial antiseptic C9H9HgNaO2S used especially for its antifungal and bacteriostatic properties see merthiolate
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