from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A colorless, white or brown tasteless compound, Hg2Cl2, used as a purgative and insecticide. Also called mercurous chloride.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. mercurous chloride Hg2Cl2
from the GNU version of the Collaborative International Dictionary of English
- n. 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.
from The Century Dictionary and Cyclopedia
- n. Hemi-, sub-, or protochlorid of mercury, or mercurous chlorid, Hg2Cl2.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a tasteless colorless powder used medicinally as a cathartic
Probably from New Latin calomelās : Greek kalos, beautiful + melās, black.(American Heritage® Dictionary of the English Language, Fourth Edition)