lining

noun3

1. •
   a layer of cloth or other material on the inside surface of something, such as a coat, a box or a pipe

   • The lobule margins, furthermore, are arched away from the lobe, with the consequence that (when fully inflated) the abaxial leaf surface forms the interior lining of the lobule. — 1992
2. •
   The material used for such a covering.
3. •
   The act of attaching such a covering.