n., pl., calx·es, or cal·ces (kăl'sēz').
The crumbly residue left after a mineral or metal has been calcined or roasted.
[Middle English, from Latin, lime, limestone, pebble, from Greek khalix, pebble.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.