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vertebra

Pronunciation: ver'te-bra, -bre

Definition: One of the segments of the vertebral column; in humans, there are usually 33 vertebrae: seven cervical, twelve thoracic, five lumbar, five sacral (fused into one bone, the sacrum), and four coccygeal (fused into one bone, the coccyx).

[L. joint, fr. verto, to turn]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

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