- vertebra - one of the bony segments of the spinal column
--1 is a kind of bone, os
--1 is a part of
--1 has part: centrum; apophysis; transverse processspinal column, vertebral column, spine, backbone, back, rachis
--1 has particulars:cervical vertebra, neck bone; thoracic vertebra, dorsal vertebra; lumbar vertebra; sacral vertebra; coccygeal vertebra, caudal vertebra