Definitions for: Spine

[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
[n] the series of vertebrae forming the axis of the skeleton and protecting the spinal cord; "the fall broke his back"
[n] a sharp-pointed tip on a stem or leaf
[n] any pointed projection

Webster (1913) Definition: Spine, n. [L. spina thorn, the spine; akin to spica a
point: cf. OF. espine, F. ['e]pine. Cf. Spike, Spinet a
musical instrument, Spinny.]
1. (Bot.) A sharp appendage to any of a plant; a thorn.

2. (Zo["o]l.)
(a) A rigid and sharp projection upon any part of an
animal.
(b) One of the rigid and undivided fin rays of a fish.

3. (Anat.) The backbone, or spinal column, of an animal; --
so called from the projecting processes upon the
vertebr[ae].

4. Anything resembling the spine or backbone; a ridge.

Synonyms: back, backbone, pricker, prickle, rachis, spinal column, spur, sticker, thorn, vertebral column

See Also: aculeus, appendage, axial skeleton, canalis vertebralis, chine, coccyx, intervertebral disc, intervertebral disk, notochord, outgrowth, process, projection, quill, ray, skeletal structure, spinal canal, tail bone, vertebra, vertebral canal

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