D defs.my
Entry 1 sense Webster, 1913

Calomel

/(kăl"ō̇*mĕl)/ · Cal·o·mel · IPA
01 n. Mild chloride of mercury, Hg2Cl2, a heavy, white or yellowish white substance, insoluble and tasteless, much used in medicine as a mercuria…
  1. 1.
    Mild chloride of mercury, Hg2Cl2, a heavy, white or yellowish white substance, insoluble and tasteless, much used in medicine as a mercurial and purgative; mercurous chloride. It occurs native as the mineral horn quicksilver.(Chem.) Also: horn quicksilver