- Backbone - Book’s backbone - Small pine needle - Vertebral column - What a worm lacks and somehow pines for? - A sharp appendage to any of a plant; a thorn. - A rigid and sharp projection upon any part of an animal.
- Of the backbone - Relating to the vertebral column - Vertebral - Of, pertaining to, or in the region of, the backbone, or
vertebral column; rachidian; vertebral. - Of or pertaining to a spine or spines.