noun, Computers.
Also called disk, hard disk. a rigid disk coated with magnetic material, on which data and programs can be stored.
(computing) another name for disk (sense 2)
magnetic disk
A memory device, such as a floppy disk or a hard disk, that is covered with a magnetic coating. Digital information is stored on magnetic disks in the form of microscopically small, magnetized needles, each of which encodes a single bit of information by being polarized in one direction (representing 1) or the other (representing 0).


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