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The Collaborative International Dictionary of English v.0.48 (gcide)

magnetic disc \magnetic disc\, magnetic disk \magnetic disk\n.
A ditical memory device consisting of a flat disk covered
with a magnetic coating on which information is stored; a
{hard disk}, {floppy disk}, and {diskette} are typically
magnetic disks.

Syn: disk, disc.
[WordNet 1.5]


diskette \diskette\ n. (Computers)
a data-storage medium consisting of a small plastic disk
coated with a thin layer of magnetizable material on one or
both sides, enclosed in a stiff envelope with a radial slit.
It is used in a specially designed disk drive, in which the
disk is rotated at high speed, and which stores data on the
disk by causing changes in the direction of magnetization of
the magnetic layer as the disk spins and as sequential
locations on the disk pass under the read-write head of the
drive. Reading of the data occurs in the reverse process, by
detection of the patterns of magnetization of the disk. Such
disks are used to store data or programs for a microcomputer.

Syn: floppy, floppy disk.
[WordNet 1.5 PJC]