|a gadget; dingus; thingumbob.|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|Sometimes (informal) shortened to: mag tape a long narrow plastic or metal strip coated or impregnated with a ferromagnetic material such as iron oxide, used to record sound or video signals or to store information in computers|
A plastic tape coated with iron oxide for use in magnetic recording.
A device for storing information, in which signals are recorded by lining up small bits of magnetic materials in the coating on the tape. Ordinary tape recorders use magnetic tape.