Medical Dictionary

thimerosal

noun thi·mer·o·sal \thī-ˈmer-ə-ˌsal\

Medical Definition of THIMEROSAL

:  a crystalline organic mercurial antiseptic C9H9HgNaO2S used especially for its antifungal and bacteriostatic properties—see merthiolate

Browse

How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears