SPINE

Definitions

1. 1. A sharp appendage to any of a plant; a thorn.
2. 2. A rigid and sharp projection upon any part of an animal.
3. 3. One of the rigid and undivided fin rays of a fish.
4. 4. The backbone, or spinal column, of an animal; -- so called from the projecting processes upon the vertebræ.
5. 5. Anything resembling the spine or backbone; a ridge.