Latinate spelling preferred in British English for most uses of disk (q.v.). American English tends to use it in the musical recording sense (1888); originally of phonograph records, recently of compact discs.

also papilloedema, non-inflammatory swelling of the optic disc, 1908, from papilla + edema.

1983, in computer jargon; also cd-rom; from compact disc read-only memory.

"catalogue of recordings by a composer or performer," 1933; see disc + -graphy.

1995, initialism (acronym) from Digital Video Disc, later changed to Digital Versatile Disc.

Earlier this year, electronics giant Toshiba positioned the first DVD players available in the U.S. as a home entertainment unit (retail price $600). [Black Enterprise magazine, June 1997]

 "enthusiast for or collector of gramophone recordings," 1940, from disc in the musical recording sense + -phile "one that loves or is attracted to." The earlier word was gramophile.

symbolic magic circle used by Buddhists in meditation, 1792, from Sanskrit mandala "disc, circle." Adopted 20c. in Jungian psychology as a symbol of unity of the self and completeness.

1858, "inclined to flop" [OED], from flop + -y (2). Floppy disc attested from 1971 (short form floppy is by 1974).

also slip-knot, 1650s, from slip (v.) + knot (n.). One which easily can be "slipped" or undone by pulling on the loose end of the last loop.

1979 as an abbreviation of compact disc as a digital system of information storage. By 1959 as an abbreviation of certificate of deposit "written statement from a bank acknowledging it has received a sum of money from the person named" (1819).