VERTEBRAL COLUMN
\vˈɜːtɪbɹə͡l kˈɒlʌm], \vˈɜːtɪbɹəl kˈɒlʌm], \v_ˈɜː_t_ɪ_b_ɹ_əl k_ˈɒ_l_ʌ_m]\
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the series of vertebrae forming the axis of the skeleton and protecting the spinal cord; "the fall broke his back"
By Princeton University