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Pronunciation: (bak'bōn"), [key]
1. Anat.the spinal column; spine.
2. strength of character; resolution.
3. something resembling a backbone in appearance, position, or function.
4. Bookbinding.a back or bound edge of a book; spine.
5. Naut.a rope running along the middle of an awning, as a reinforcement and as an object to which a supporting bridle or crowfoot may be attached.
6. Naval Archit.the central fore-and-aft assembly of the keel and keelson, giving longitudinal strength to the bottom of a vessel.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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