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|Noun||1.||hard disc - a rigid magnetic disk mounted permanently in a drive unit|
disc drive, disk drive, hard drive, Winchester drive - computer hardware that holds and spins a magnetic or optical disk and reads and writes information on it
magnetic disc, magnetic disk, disc, disk - (computer science) a memory device consisting of a flat disk covered with a magnetic coating on which information is stored
removable disk - a hard disk that can be removed from the disk drive; removal prevents unauthorized use