from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See spinal column.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The series of vertebrae that protect the spinal cord; the spinal column.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
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