champlevé

Etymology
From.

Adjective

 * 1)  Having the ground engraved or cut out in the parts to be enamelled; inlaid in depressions made in the ground; said of a kind of enamel work in which depressions made in the surface are filled with enamel pastes, which are then fired.

Noun

 * 1) A piece of enamel of this kind.
 * 2) The process of making enamel of this kind.