The Collaborative International Dictionary
mercurialism
mercurialism \mer*cu"ri*al*ism\, n. [Mercurial + -ism.] (Med.) The syndrome produced by poisoning due to exposure to mercury, it fumes, or its compounds; mercury poisoning. Such exposure may occur in mining or smelting, or in using mercurial compounds.
Wiktionary
mercurialism
n. Chronic mercury poisoning