The Collaborative International Dictionary of English v.0.48:

cut-in \cut-in\ n.
   1. (film) a still inserted and interrupting the action.

   Syn: insert.
        [WordNet 1.5]

   2. (broadcasting) a local announcement inserted into a
      network broadcast.

   Syn: insert.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Cutin \Cu"tin\ (k[=u]"t[i^]n), n. [L. cutis skin, outside.]
   (Plant Physiol.)
   A waxy substance containing fatty acids, soaps, and resinous
   material which, combined with cellulose, forms a substance
   nearly impervious to water and constituting the cuticle in
   plants.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

cutin
    n 1: (biochemistry) a waxy transparent material that occurs in
         the cuticle of plants and consists of highly polymerized
         esters of fatty acids