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calomel

American  
[kal-uh-mel, -muhl] / ˈkæl əˌmɛl, -məl /

noun

Pharmacology.
  1. a white, tasteless powder, Hg 2 Cl 2 , used chiefly as a purgative and fungicide.


calomel British  
/ -məl, ˈkæləˌmɛl /

noun

  1. a colourless tasteless powder consisting chiefly of mercurous chloride, used medicinally, esp as a cathartic. Formula: Hg 2 Cl 2

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of calomel

1670–80; < New Latin calomelas coined from Greek kaló ( s ) fair + mélas black; allegedly so called because its original preparation involved turning black powder into white

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Their patients rarely suffered any mercury poisoning from the treatments because calomel has a very low solubility, as suggested by its very small Ksp:

From Textbooks • Feb. 14, 2019

Although most mercury compounds are now known to be poisonous, eighteenth-century physicians used calomel as a medication.

From Textbooks • Feb. 14, 2019

The books and encyclopedias on his tables are replaced by syringes and bowls, bottles of orange-flower water, gentian, licorice, quinine and calomel.

From Time Magazine Archive

The carbonate and bicarbonate of soda tend to alkalize the system; the colon bacilli prevent putrefaction and toxemia; calomel and purge clean out the gall bladder and bowels.

From Time Magazine Archive

To ease the dying man, he administered a dose of calomel and placed loaves of hot bread around his body.

From "The Namesake" by Jhumpa Lahiri

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