Movies. a still, as of a scene or an object, inserted in a film and interrupting the action or continuity: We will insert a cut-in of the letter as she reads it.
2.
Radioand Television. a commercial or other announcement inserted by a local station into a network broadcast.
cutin (kyt'n) Pronunciation Key
A waxlike, water-repellent polyester consisting of fatty acids and aromatic compounds that occurs naturally in the walls of many plant cells. Cutin acts together with wax to form the cuticle, a barrier protecting the aboveground surfaces of plants from water loss and microbial attack.