noun, plural calx·es, cal·ces [kal-seez] /ˈkæl siz/.
the oxide or ashy substance that remains after metals, minerals, etc., have been thoroughly roasted or burned.
Origin of calx
1350–1400; late Middle English < Latin: lime; replacing Middle English cals < Old French < Latin
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for calces
Historical Examples of calces
Metals then were regarded as compounds of calces and phlogiston.
Its calces are white when imperfect, but black, or dark green, when perfect.
It may be resuscitated, like the calces of Antimony, into a Regulus, by re-uniting it with a phlogiston.
All the calces of Antimony, when exposed to a violent fire, are converted into Glass; but not all with the same facility.
British Dictionary definitions for calces
noun plural calxes or calces (ˈkælsiːz)
the powdery metallic oxide formed when an ore or mineral is roasted
anatomy the heel
Word Origin for calx
C15: from Latin: lime, from Greek khalix pebble
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
n. pl. calx•es
The crumbly residue left after a mineral or metal has been calcined or roasted.
The posterior rounded extremity of the foot; the heel.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.