Thiomersal

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A compound, chemical formula C₉H₉HgNaO₂S, used as an antiseptic and antifungal agent, especially in vaccines. uncountable

Etymology

From thio- + -mer- (“mercury-containing drug”) + -sal (“salicylic acid derivative”).

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.