disk

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Related to discs: Intercalated discs

disk

1. The two-dimensional projection of the surface of a star or planet.
2. See Galaxy; galaxies.

Disk

A flat, circular, raised ornament, carved as a series of disks adjacent to each other.

disk

[disk]
Also spelled disc.
(astronomy)
A relatively thin layer of material distributed in the central plane of a spiral galaxy, in contrast to the nucleus or halo.
(biology)
Any of various rounded and flattened animal and plant structures.
(computer science)
A rotating circular plate having a magnetizable surface on which information may be stored as a pattern of polarized spots on concentric recording tracks. Also known as magnetic disk.
(engineering acoustics)
(mathematics)
The region in the plane consisting of all points with norm less than 1 (sometimes less than or equal to 1).

disk

(storage)
1. magnetic disk.

2. compact disc.

3. optical disk.

Note: the american spelling, "disk", is normal for most computer disks whereas "compact disc", having come to computers via the audio world, is correctly spelled with a "c", indeed, this spelling is part of the CD standard.

disk

A direct access storage device. See floppy disk, hard disk, magnetic disk, optical disc, CD-ROM and DVD.


Disk and Memory Work Together
On the disk, data are stored in sectors, which hold a chunk of data (typically 512 bytes) and are the smallest unit that can be read or written. Memory is broken up into squares like a checkerboard, each square holding one byte. The contents of any single byte or group of bytes can be calculated, compared and copied independently. That is how fields are put together to form records and broken apart when read back in.
References in classic literature ?
All manner of discs had to be tried, some smaller and thinner than a dime and others of steel boiler-plate as heavy as the shield of Achilles.
He stopped to listen, and, as one of the bystanders afterwards said, no one could forget the look of awe that came into his face as he heard that iron disc talking with a human voice.
Monseigneur can't run now, no more can I; but monseigneur throws the disc as nobody else can throw it.
TARA of Helium rose from the pile of silks and soft furs upon which she had been reclining, stretched her lithe body languidly, and crossed toward the center of the room, where, above a large table, a bronze disc depended from the low ceiling.
From the gaff of one, two gay flags hung limply, one a checkerboard of blue and white squares, the other a white pennant centred with a red disc.
The highest summit of all towers to a height of 22,606 feet above the surface of the lunar disc.
Thus they remarked that, during full moon, the disc appeared scored in certain parts with white lines; and, during the phases, with black.
As to the phenomenon known as the "ashy light," it is explained naturally by the effect of the transmission of the solar rays from the earth to the moon, which give the appearance of completeness to the lunar disc, while it presents itself under the crescent form during its first and last phases.
Consequently, their arrival on the lunar disc could not take place until the 5th of December at twelve at night, at the exact moment when the moon should be full, and not on the
Indeed it was thought that all observations would have to be put off to the 3d of January in the following year; for the moon entering its last quarter on the 11th, would then only present an ever-decreasing portion of her disc, insufficient to allow of their following the course of the projectile.
Between the darkness of earth and heaven she was burning fiercely upon a disc of purple sea shot by the blood-red play of gleams; upon a disc of water glitter- ing and sinister.
The person who wanted him was in the kitchen, and in the first moments, by the imperfect fire and candle light, Tom had not even an indefinite sense of any acquaintance with the rather broad-set but active figure, perhaps two years older than himself, that looked at him with a pair of blue eyes set in a disc of freckles, and pulled some curly red locks with a strong intention of respect.