A single human vertebra.
vertebra definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
vertebra definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
noun pl. ver·te·brae or ver·te·bras
Any of the bones or cartilaginous segments forming the spinal column.
Origin: Middle English, from Latin, from vertere, to turn; see wer-2 in Indo-European roots.
vertebra - Medical Definition
The American Heritage® Medical Dictionary Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
noun pl. ver·te·bras or ver·te·brae
Any of the bones or cartilaginous segments of the spinal column, usually 33 in number.
vertebra - Science Definition
Plural vertebrae vertebrae or vertebras
Any of the bones that make up the vertebral column. Each vertebra contains an arched, hollow section through which the spinal cord passes. In humans, the vertebrae are divided into cervical, thoracic, and lumbar sections, and the sacrum and coccyx are both made up of a series of fused vertebrae. The vertebrae are separated by cartilaginous intervertebral disks. See more at skeleton.