thiomersal
noun
thiomersal is a noun meaning “A compound, chemical formula C₉H₉HgNaO₂S, used as an antiseptic and antifungal agent, especially in vaccines” (English Wiktionary, September 2026). It is spelled T-H-I-O-M-E-R-S-A-L, and it appears about once in every 51 million words in written English (wordfreq, 2021 data).
What does thiomersal mean?
noun
- 1
A compound, chemical formula C₉H₉HgNaO₂S, used as an antiseptic and antifungal agent, especially in vaccines.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of thiomersal
- thimerosal
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is thiomersal?
Thiomersal appears about once in every 51 million words in written English, the 222,788th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Thiomersal in Spanish, French, German and Portuguese
In the sense compound:
| Language | Words |
|---|---|
| Spanish | thiomersal |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does thiomersal come from?
From thio- + -mer- (“mercury-containing drug”) + -sal (“salicylic acid derivative”).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).