1. [ noun ] (anatomy,zoology) the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
Synonyms: spine vertebral_column backbone back spinal_column

"the fall broke his back"

Related terms: skeletal_structure notochord chine axial_skeleton vertebra coccyx intervertebral_disc spinal_canal
2. [ noun ] (botany) axis of a compound leaf or compound inflorescence
Related terms: axis
Similar spelling:   rakish