· the series of vertebrae forming the axis of the skeleton and protecting the spinal cord; "the fall broke his back"
Synonym(s): spinal_column, vertebral_column, backbone, back, rachis
Hypernym(s): skeletal_structure
· any sharply pointed projection
Hypernym(s): projection
· a small sharp-pointed tip resembling a spike on a stem or leaf
Synonym(s): thorn, prickle, pricker, sticker, spikelet
Hypernym(s): aculeus
· the part of a book's cover that encloses the inner side of the book's pages and that faces outward when the book is shelved; "the title and author were printed on the spine of the book"
Synonym(s): backbone
· a sharp rigid animal process or appendage; as a porcupine quill or a ridge on a bone or a ray of a fish fin
Hypernym(s): process, outgrowth, appendage