any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles | electronic equipment that provides visual images of varying electrical quantities |
a piece of electronic equipment that keeps track of the operation of a system continuously and warns of trouble | a magnifier of images of distant objects |
electronic equipment that is used to check the quality or content of electronic transmissions | an area in which something acts or operates or has power or control: |
display produced by a device that takes signals and displays them on a television screen or a computer monitor | the state of the environment in which a situation exists |
someone who gives a warning so that a mistake can be avoided | |
someone who supervises (an examination) | |