noun. A white or brown tasteless powder, Hg₂Cl₂, used as an insecticide and formerly as a purgative.

noun. Hemi-, sub-, or protochlorid of mercury, or mercurous chlorid, Hg₂Cl₂.

noun. 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.

noun. mercurous chloride Hg2Cl2

noun. a tasteless colorless powder used medicinally as a cathartic

"In the nineteenth century, a mercury compound called calomel was used to treat everything from tuberculosis and parasites to toothaches and constipation."

calomel electrode  

chloride  

arsenic  aspirin  borax  botheration  chloral  

horn quicksilver