Dictionary.net

• A stone of convex form, highly polished, but not faceted; also, the style of cutting itself. Such stones are said to be cut en cabochon.

2010 - New Age Dictionary Database
By Oddity Software

• A stone of convex form, highly polished, but not faceted; also, the style of cutting itself. Such stones are said to be cut en cabochon.

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