A round, flat structure, particularly the fibrous cartilage layer between two vertebrae (the bones that make up the spine). Also called intervertebral disk.
Round, flat recording medium which consists of a substrate(s) with one or more layers deposited on the surface(s) onto which information can be recorded and played back when the disk is loaded in a disk drive.
A ringlike structure that fits between the vertebrae in the spine to protect the bones, nerves, and blood vessels. The outer layer is a tough, fibrous tissue, and the inner core is composed of more elastic tissue. movements.