cabochon /(kă`bŭ*shän"; F. kȧ`bō̇`shôN")/

ca·bo·chon

cabochon

n.
  1. 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. (Jewelry)

cabochon

a.
  1. Of, pertaining to, containing, or in the style of, a cabochon. (Jewelry)