chromakey
Pronunciation: /ˈkrəʊməkiː/
Definition of chromakey
noun
- a digital technique by which a block of a particular colour (often blue or green) in a film or video image can be replaced by another colour or image, enabling, for example, a weather forecaster to appear against a background of a computer-generated weather map: the weatherman is gesturing at a blank wall, and the image is inserted by chromakey