Spine

n.	1.	(Bot.) A sharp appendage to any of a plant; a thorn.
	2.	(Zool.) A rigid and sharp projection upon any part of an animal.
	3.	(Anat.) The backbone, or spinal column, of an animal; - so called from the projecting processes upon the vertebræ.
	4.	Anything resembling the spine or backbone; a ridge.

Noun	1.	spine - the series of vertebrae forming the axis of the skeleton and protecting the spinal cord; "the fall broke his back" Synonyms: spinal column, vertebral column, rachis, backbone, back
	2.	spine - any pointed projection Synonyms: spur
	3.	spine - a sharp-pointed tip on a stem or leaf Synonyms: pricker, prickle, sticker, thorn
	4.	spine - a sharp rigid animal process or appendage; as a porcupine quill or a ridge on a bone or a ray of a fish fin

advocate, alpenstock, arm, athletic supporter, back, backbone, backing, bandeau, barb, barbel, barbule, bearer, bilge, blain, bleb, blister, blob, boss, bow, bra, brace, bracer, bracket, bramble, brassiere, brier, bristle, bubble, bulb, bulge, bulla, bump, bunch, burl, burr, button, buttress, cactus, cahot, cane, carrier, catchweed, cervix, chine, cleavers, clump, col, comb, condyle, convex, corset, crook, crutch, dowel, ear, esker, flange, flap, foundation garment, fulcrum, gall, girdle, gnarl, goose grass, guy, guywire, handle, hill, hogback, horseback, hump, hunch, jock, jockstrap, jog, joggle, kame, knob, knot, knur, knurl, lip, loop, lump, mainstay, maintainer, mast, mole, mountain, neck, needle, nettle, nevus, nub, nubbin, nubble, papilloma, peg, pine needle, prickle, prong, prop, quill, rachis, ray, reinforce, reinforcement, reinforcer, rest, resting place, rib, ridge, rigging, ring, saddle, saddleback, shoulder, shroud, spicula, spicule, spiculum, spike, spikelet, spinal column, spinal cord, sprit, spur, staff, standing rigging, stave, stay, stick, sticker, stiffener, strengthener, stud, style, support, supporter, sustainer, tab, thistle, thorn, tubercle, tubercule, upholder, verruca, vertebral column, vesicle, wale, walking stick, wart, welt, yucca