- containing univalent mercury, Hg+1 or Hg2+2.
- of or containing mercury in the monovalent state; denoting a mercury(I) compound. Mercurous salts contain the divalent ion Hg² 2 +
- Relating to or containing mercury, especially with a valence of 1.
- Containing mercury, especially mercury with a valence of 1. Compare mercuric.