inlay

Short definition from Wiktionary

Verb

1. 1
   To place (pieces of a foreign material) within another material to form a decorative design.
2. 2
   To place an inlay in a tooth.

Noun

1. 1
   The material placed within a different material in the form of a decoration.
2. 2
   A filling for a tooth, made of ceramic or gold to fit the cavity and shape of tooth and cemented into place.
3. 3
   The piece of paper or the booklet inside the case of a compact disc, DVD, or cassette.