thimerosal thimbleweed • thin · · · Info · Definitions · Synonyms · Characters · · thimerosal · · Text Latin · · Script 10 · · Length 4 · · Syllables Definitions · · · (noun) a light-colored crystalline powder (trade name Merthiolate) used as a surgical antiseptic. Synonyms: sodium ethylmercurithiosalicylate, Merthiolate. · · Noun Definition 1 Synonyms · · · sodium ethylmercurithiosalicylate · · Synonym 1 merthiolate · · Synonym 2 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074