from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An opaque or milk-white chalcedony, a variety of quartz.
- n. A similar variety of opal.
from the GNU version of the Collaborative International Dictionary of English
- n. An opaque or milk-white chalcedony, a variety of quartz; also, a similar variety of opal.
from The Century Dictionary and Cyclopedia
- n. A variety of opal, often called pearl-opal, usually milk-white, sometimes grayish- or yellowish-white, in color, and opaque or slightly translucent at the edges.
From French cacholong, said to be from Cach, the name of a river in Bucharia + cholon, a Calmuck word for stone; or from a Calmuck word meaning "beautiful stone". (Wiktionary)