1. Noun
A sharp appendage to any of a plant; a thorn.
2. Noun
A rigid and sharp projection upon any part of an animal.
3. Noun
One of the rigid and undivided fin rays of a fish.
4. Noun
The backbone, or spinal column, of an animal; -- so called from the projecting processes upon the vertebrae.
5. Noun
Anything resembling the spine or backbone; a ridge.
6. Noun
the series of vertebrae forming the axis of the skeleton and protecting the spinal cord; "the fall broke his back"
Vocabulary classified under Medicine and healthcare
7. Noun
a sharp rigid animal process or appendage; as a porcupine quill or a ridge on a bone or a ray of a fish fin
Vocabulary classified under Nature and environment
8. Noun
a small sharp-pointed tip resembling a spike on a stem or leaf
Vocabulary classified under Nature and environment
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