As a verb vaccine
As a noun thiomersal is
a compound, chemical formula c9
s, used as an antiseptic and antifungal agent, especially in vaccines.
(immunology) A substance given to stimulate the body's production of antibodies and provide immunity against a disease, prepared from the agent that causes the disease, or a synthetic substitute.
A compound, chemical formula C9H9HgNaO2S, used as an antiseptic and antifungal agent, especially in vaccines.
* sodium ethylmercurithiosalicylate