vertebra

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vertebra

one of the bony segments of the spinal column
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

vertebra

[′vərd·ə·brə]
(anatomy)
One of the bones that make up the spine in vertebrates.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.