Definition of thimerosal in US English:

thimerosal

noun

  • A local antiseptic for abrasions and minor cuts.

    Chemical formula: C₉H₉HgNaO₂S

    • ‘Steps were rapidly taken to remove thimerosal from vaccines by switching to single-dose vials that did not require any preservative.’
    • ‘Her research shows that thimerosal is a strong allergen.’
    • ‘Except for local hypersensitivity reactions, thimerosal has not been found to cause any harm.’
    • ‘Polio, MMR, and varicella vaccines have never contained thimerosal.’
    • ‘And because thimerosal is added in the manufacturing process, its presence may not even have to be disclosed on the labeling.’

Pronunciation

thimerosal

/THīˈmerəsəl/