1) Kind of oxide 2) Mercurous 3) Metal 4) Metallic element 5) Of or containing mercury 1) Mercurous 
• (a.) Of, pertaining to, or derived from, mercury; containing mercury; -- said of those compounds of mercury into which this element enters in its lowest proportion.
(mәr-kūr´ik) pertaining to mercury as a bivalent element; containing bivalent mercury.
Mer·cu'ric adjective (Chemistry) Of, pertaining to, or derived from, mercury; containing mercury; -- said of those compounds of mercury into which this element enters in its lowest proportion. Mercuric chloride , 
Type: Term Pronunciation: mer-kyū′rik Definitions: 1. Denoting a salt of mercury in which the ion of the metal is bivalent, as in corrosive sublimate, mercuric chloride: the mercurous chloride is calomel.
[adj] - (chemistry) of or containing mercury
mercurous adjective of or containing mercury