1. A thin, flat, circular object or plate.
2. The disk used in a disc brake.
3. A disk used on a disk harrow for agricultural purposes.
4. A magnetic disk; such as, a floppy disk or hard disk; the data stored on such a disk: "The instructions suggested that we read the disk that came with the manual."
5. A round, flattened, plate-like structure in an animal; such as, an intervertebral disk.
6. In botany, the enlarged area bearing numerous tiny flowers, as in the flower head of composite plants; such as, the daisy. Also called a discus.
7. In computer science, a magnetic disk; such as, a floppy disk or hard disk.
8. An optical disk, especially a compact disk.
9. A circular grid in a phototypesetting machine.

1. To work (soil) with a disk harrow.
2. To make (a recording) on a phonograph record.

1. A compact disk that is used with a computer (rather than with an audio system).
2. A large amount of digital information that can be stored and accessed, but it cannot be altered by the user.
3. An optical disk that is physically the same as an audio CD, but contains computer data.

"Storage capacity is about 680 megabytes. CD-ROMs are interchangeable between different types of computers."

A rewritable version of a CD-ROM.

A CD-RW drive can write about 650 megabytes of data to CD-RW media an unlimited number of times.

A recordable CD-ROM which can be read by normal CD-ROM drives; however, the data can only be recorded once onto a CD-R, and cannot be changed.

A rigid magnetic disk mounted permanently in a drive unit of a computer.

Plates of fibrocartilage placed between two vertebrae (special types of bones that form the spinal column), covering their inferior and superior surfaces: "The intervertebral discs play a primary use in weight bearing and a lesser degree in movement."

"The intervertebral discs or nucleus pulposus (soft moist solid) are fibro-cartilaginous discs that lie between the vertebral bodies in the spine."

These intervertebral disks are composed of a central gelatinous-like material that provide a cushioning or shock absorbing quality to the spinal column to axial stress. The discs may herniate or rupture, resulting in a condition known as a radiculopathy."

A grooveless disk on which digital data; such as, text, music, or pictures, is stored as tiny pits in the surface and is read or replayed by a laser beam scanning the surface.

A painful rupture of the fibrocartilage of the disc between spinal vertebrae which occurs most often in the lumbar region of the back.