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spine

DEFINITIONS OF: spine

1

n the series of vertebrae forming the axis of the skeleton and protecting the spinal cord

Synonyms:
back, backbone, rachis, spinal column, vertebral column
Types:
notochord
a flexible rodlike structure that forms the supporting axis of the body in the lowest chordates and lowest vertebrates and in embryos of higher vertebrates
chine
backbone of an animal
urochord
a notochord of a larval tunicate typically confined to the caudal region
Type of:
skeletal structure
any structure created by the skeleton of an organism

n any sharply pointed projection

Synonyms:
acantha, spur
Type of:
projection
any solid convex shape that juts out from something

n a sharp rigid animal process or appendage; as a porcupine quill or a ridge on a bone or a ray of a fish fin

Types:
ray
any of the stiff bony spines in the fin of a fish
quill
a stiff hollow protective spine on a porcupine or hedgehog
Type of:
appendage, outgrowth, process
a natural prolongation or projection from a part of an organism either animal or plant

n a small sharp-pointed tip resembling a spike on a stem or leaf

Synonyms:
pricker, prickle, spikelet, sticker, thorn
Types:
glochid, glochidium
a barbed spine or bristle (often tufted on cacti)
Type of:
aculeus
a stiff sharp-pointed plant process

n 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”
Synonyms:
backbone
Type of:
part, portion
something less than the whole of a human artifact
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