intervertebral disk

English Thesaurus

1. a fibrocartilaginous disc serving as a cushion between all of the vertebrae of the spinal column (except between the first two) (noun.body)

hypernym	:	disc, disk, saucer,
definition	:	something with a round shape resembling a flat circular plate (noun.shape)

part meronym	:	back, backbone, rachis, spinal column, spine, vertebral column,
definition	:	the series of vertebrae forming the axis of the skeleton and protecting the spinal cord (noun.body)