spine

spine is defined in Webster's Unabridged Dictionary (1913) with 3 senses. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.(Zoöl.) (a) A rigid and sharp projection upon any part of an animal. (b) One of the rigid and undivided fin rays of a fish.
  2. 2.(Anat.) The backbone, or spinal column, of an animal; -- so called from the projecting processes upon the vertebræ.
  3. 3.Anything resembling the spine or backbone; a ridge.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

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