[thahy-mur-uh-sal, -mer-]

noun Pharmacology.

a cream-colored, crystalline, water-soluble powder, C9H9HgNaO2S, used chiefly as an antiseptic.

Origin of thimerosal

1945–50; perhaps thi- + mer(cury) + -o- + sal(icylate) Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for thimerosal

British Dictionary definitions for thimerosal



a creamy white crystalline compound of mercury, used in solution as an antiseptic. Formula: C 9 H 9 HgNaO 2 S

Word Origin for thimerosal

C20: from thio- + mer (cury) + sal (icylate)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for thimerosal




A mercury-based crystalline powder with antibacterial and antifungal properties, used as a local antiseptic and preservative in vaccines and other drugs.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.