1. Relating to mercury. 2. Any salt of mercury used medicinally. 3. Having the characteristic of rapid, changing moods.
* * *
mer·cu·ri·al (.)mər-'kyu̇r-ē-əl adj of, relating to, containing, or caused by mercury <\mercurial salves>
* * *
mer·cu·ri·al (mər-kūrґe-əl) [L. mercurialis] 1. pertaining to mercury. 2. a preparation of mercury.Medical dictionary. 2011.