Spine

·noun A sharp appendage to any of a plant; a thorn.

II. Spine ·noun One of the rigid and undivided fin rays of a fish.

III. Spine ·noun Anything resembling the spine or backbone; a ridge.

IV. Spine ·noun A rigid and sharp projection upon any part of an Animal.

V. Spine ·noun The backbone, or spinal column, of an animal;

— so called from the projecting processes upon the vertebrae.

Spine-finned
·adj Having fine supported by spinous fin rays; — said of certain fishes. ...

Webster's Dictionary of the English Language
Spine-tailed
·adj Having the tail quills ending in sharp, naked tips. ...

Webster's Dictionary of the English Language
spine-bill
n. an Australian «Honey-eater,» but not now so classed. There are two species – – The Slender Spine...

Dictionary of Australasian Words Phrases and Usages by Edward E. Morris