thimerosal: meaning, definition, pronunciation and examples
LowTechnical/Scientific
Quick answer
What does “thimerosal” mean?
An organomercury compound used as a preservative in vaccines and other medical products.
Audio
Pronunciation
Definition
Meaning and Definition
An organomercury compound used as a preservative in vaccines and other medical products.
A mercury-containing antiseptic and antifungal agent, historically employed to prevent bacterial and fungal contamination in multi-dose vials of vaccines and immunoglobulin preparations.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or spelling differences. The compound name is standardized internationally.
Connotations
In both varieties, the word is strongly associated with medical and public health discourse, often with negative connotations due to safety concerns, though the intensity of debate has varied regionally over time.
Frequency
Frequency is equally low in both varieties, confined to specialized medical, pharmaceutical, and public health contexts.
Grammar
How to Use “thimerosal” in a Sentence
N of thimerosalthimerosal in NN containing thimerosalVocabulary
Collocations
Examples
Examples of “thimerosal” in a Sentence
adjective
British English
- The thimerosal-containing vaccine was phased out.
- A thimerosal-free alternative was developed.
American English
- The thimerosal-containing vaccine was phased out.
- A thimerosal-free alternative was developed.
Usage
Meaning in Context
Business
Rare, except in pharmaceutical manufacturing or regulatory compliance discussions.
Academic
Common in medical, pharmacological, public health, and toxicology literature.
Everyday
Very rare; used primarily by individuals engaged in vaccine safety debates.
Technical
The primary domain. Used precisely in pharmacology, vaccine formulation, and regulatory science.
Vocabulary
Synonyms of “thimerosal”
Strong
Neutral
Weak
Vocabulary
Antonyms of “thimerosal”
Watch out
Common Mistakes When Using “thimerosal”
- Misspelling as 'thimersol', 'thimerasol', or 'thimerisol'.
- Using it as a countable noun (e.g., 'a thimerosal') instead of an uncountable substance name.
- Pronouncing the 'th' as /t/ instead of /θ/.
FAQ
Frequently Asked Questions
Its use has been greatly reduced. It has been removed from or reduced to trace amounts in most routine childhood vaccines but may still be present in some multi-dose vials of influenza, tetanus, and other vaccines.
It contains ethylmercury, leading to public health concerns in the late 1990s and early 2000s about a potential link to neurodevelopmental disorders like autism. Subsequent extensive scientific reviews have found no evidence supporting this link.
There is no difference; 'thiomersal' is the name commonly used in the UK and some other countries, while 'thimerosal' is the US variant. They refer to the same chemical compound.
The ethylmercury in thimerosal is processed and eliminated from the body much faster than methylmercury (found in some fish). At the doses present in vaccines, major global health organizations like the WHO have concluded it poses no risk of toxicity.
An organomercury compound used as a preservative in vaccines and other medical products.
Thimerosal is usually technical/scientific in register.
Thimerosal: in British English it is pronounced /θaɪˈmɛrəsæl/, and in American English it is pronounced /θaɪˈmɛrəˌsɔːl/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[No established idioms for this technical term]”
Learning
Memory Aids
Mnemonic
Think: 'THIs MERCury preservative SAVes vIALs' -> THIMEROSAL.
Conceptual Metaphor
PRESERVATIVE IS A SHIELD (against contamination); CONTROVERSIAL CHEMICAL IS A LIGHTNING ROD (for public concern).
Practice
Quiz
What is the primary function of thimerosal?