The American Heritage® Dictionary of the English Language, 4th Edition
n. Variant of chalcedony.
The Century Dictionary and Cyclopedia
n. See chalcedony.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a milky or greyish translucent to transparent quartz
Word Usage
"It is called la table des Grands Capitaines, and the porcelain top features great military commanders, represented here in a stunning imitation of antique calcedony cameos."