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 (kăl′ə-mĕl′, -məl)
A white or brown tasteless powder, Hg2Cl2, used as an insecticide and formerly as a purgative. Also called mercurous chloride.

[Probably from New Latin calomelās : Greek kalos, beautiful + melās, black.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˈkæləˌmɛl; -məl)
(Elements & Compounds) a colourless tasteless powder consisting chiefly of mercurous chloride, used medicinally, esp as a cathartic. Formula: Hg2Cl2
[C17: perhaps from New Latin calomelas (unattested), literally: beautiful black (perhaps so named because it was originally sublimed from a black mixture of mercury and mercuric chloride), from Greek kalos beautiful + melas black]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈkæl əˌmɛl, -məl)

a white, tasteless powder, Hg2Cl2, used chiefly as a purgative and fungicide. Also called mercurous chloride.
[1670–80; < New Latin calomelas]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.calomel - a tasteless colorless powder used medicinally as a cathartic
black lotion, blackwash - a mixture of calomel and limewater that is used on syphilitic sores
atomic number 80, Hg, hydrargyrum, mercury, quicksilver - a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures
chloride - any compound containing a chlorine atom
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References in classic literature ?
'prentices and Guster, to their consternation, "if I am told by the doctor that calomel or castor-oil is good for me, I may naturally ask what is calomel, and what is castor-oil.
The latter was a feeble child, and it was only by prodigious quantities of calomel that Lady Southdown was able to keep him in life at all.
Besides,' said Bob, lowering his voice to a confidential whisper, 'they will be all the better for it; for, being nearly out of drugs, and not able to increase my account just now, I should have been obliged to give them calomel all round, and it would have been certain to have disagreed with some of them.
All the potentials were in reference to saturated calomel electrode (SCE).
An electrochemical cell containing a single compartment of three electrodes was used: 2524-T3 aluminium alloy as working electrode (WE) of exposed area of 1 [cm.sup.2], a Pt foil as counter electrode (CE) and reference electrode (RE) of saturated calomel Hg/ [Hg.sub.2][Cl.sub.2], [KCl.sub.sat].
Glassy carbon electrode (GC, PINE Company, part # AFE1XFP030GCR) with surface area 0.071cm 2, saturated calomel electrode (SCE), (Fisher scientific company cat # 1363951) and Beckmann platinum wire of 1mm diameter, were used as working, reference electrode and counter electrodes, respectively.
Standards inevitably are based on what the authorities think are "best practices." Until rather recently, most medical treatment was ineffective and often quite harmful: e.g., bleeding, purging, and toxic medications like calomel (mercury).
The reference electrode was a calomel electrode (SCE, Radiometer 401) placed close to the CNT sample using a protective Schott tube with Pt frit (Schott B281).
Zinc cations were produced by anodic dissolution method [17] using a three-electrode cell in which a zinc plate (purity 99.99%) with a surface of 1 x 1 [cm.sup.2] as a working electrode, a saturated calomel electrode as a reference electrode, and a platinum (Pt) plate as a counter electrode were used.
The working electrode was a carbon electrode; a calomel (Hg/HgCl) electrode was used as reference and a platinum strand served as the auxiliary electrode.
Electrochemical polymerization of EDOT on the HNT-modified alkali-treated Ti alloy was done in a three-electrode cell arrangement using cyclic voltammetry (CV CHI 760C electrochemical workstation (USA)) in which the alkali-treated Ti alloy and platinum electrodes were the working electrode and counterelectrode, and saturated calomel electrode (SCE) served as the reference electrode, respectively.
In case of multiple larvae and in advanced stages of development and tissue destruction, local application of several substances such as oil of turpentine, larvicidal drug like Negasunt[R], [16] mineral oil, ether, chloroform, ethyl chloride, mercuric chloride, creosote, saline, phenol, calomel, olive oil, iodoform, can be used to ensure complete removal of all larvae.