a telecommunication system that transmits images of objects (stationary or moving) between distant points | any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles |
an electronic device that receives television signals and displays them on a screen | a piece of electronic equipment that keeps track of the operation of a system continuously and warns of trouble |
broadcasting visual images of stationary or moving objects | electronic equipment that is used to check the quality or content of electronic transmissions |
| display produced by a device that takes signals and displays them on a television screen or a computer monitor |
| someone who gives a warning so that a mistake can be avoided |
| someone who supervises (an examination) |