| an abnormal protrusion of a spinal disk between vertebrae, most often in the lumbar region of the spine, causing pain due to pressure on spinal nerves. |
herniated disk n.
The protrusion of a degenerated or fragmented intervertebral disk into the intervertebral foramen, compressing the nerve root. Also called protruded disk, ruptured disk.
ruptured disk n.
See herniated disk.