Spine

noun
1.
the spinal or vertebral column; backbone.
2.
any backbonelike part.
3.
a stiff, pointed process or appendage on an animal, as a quill of a porcupine, or a sharp, bony ray in the fin of a fish.
4.
something, as a quality or trait, that constitutes a principal strength; resolution; stamina; backbone:
a situation that would test a person’s spine.
5.
a ridge, as of ground or rock.
6.
a sharp-pointed, hard or woody outgrowth on a plant; thorn.
7.
Bookbinding. the back of a book cover or binding, usually indicating the title and author.
noun
1.
the spinal column
2.
the sharply pointed tip or outgrowth of a leaf, stem, etc
3.
(zoology) a hard pointed process or structure, such as the ray of a fin, the quill of a porcupine, or the ridge on a bone
4.
the back of a book, record sleeve, etc
5.
a ridge, esp of a hill
6.
strength of endurance, will, etc
7.
anything resembling the spinal column in function or importance; main support or feature

spine (spīn)
n.

See spinal column.

Any of various short pointed projections, processes, or appendages of bone.

spine
(spīn)

See vertebral column.

Any of various pointed projections, processes, or appendages of animals.

A sharp-pointed projection on a plant, especially a hard, narrow modified leaf, as on a cactus, that is adapted to reduce water loss. Compare thorn. See more at leaf.

spinal adjective