Dictionary.net

• A hydrous carbonate of copper and zinc, found in pale green or blue crystalline aggregations. It yields a kind of brass on reduction.

2010 - New Age Dictionary Database
By Oddity Software

• A hydrous carbonate of copper and zinc, found in pale green or blue crystalline aggregations. It yields a kind of brass on reduction.

1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.