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
Why and where is thimerosal used?
—Gabrielle Emanuel, NPR, 30 Jan. 2026
John Gilmore, founder and executive director of the Autism Action Network, advocate for legislation to ban use of thimerosal in vaccines in New York, and a parent of an autistic child.
—O. Rose Broderick, STAT, 28 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
Why and where is thimerosal used?
—Gabrielle Emanuel, NPR, 30 Jan. 2026
John Gilmore, founder and executive director of the Autism Action Network, advocate for legislation to ban use of thimerosal in vaccines in New York, and a parent of an autistic child.
—O. Rose Broderick, STAT, 28 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 23 Feb. 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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