| C2 | second cervical nerve; second cervical vertebra; second component of complement |
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| C3 | third cervical nerve; third cervical vertebra; third component of complement |
| C4 | fourth cervical nerve; fourth cervical vertebra; fourth component of complement |
| C5 | fifth cervical nerve; fifth cervical vertebra; fifth component of complement |
| C6 | sixth cervical nerve; sixth cervical vertebra; sixth component of complement |
| cranial vertebra | A segment of the skull regarded as homologous with a segment of the vertebral column. (05 Mar 2000) |
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| ivory vertebra | A radiographically dense vertebra, usually from metastatic disease, especially lymphoma when solitary. (05 Mar 2000) |
| odontoid vertebra | <botany> A stem, commonly used for the main stem of a whole plant or of an inflorescence. (09 Oct 1997) |
| toothed vertebra | <botany> A stem, commonly used for the main stem of a whole plant or of an inflorescence. (09 Oct 1997) |
| true vertebra | Any one of the cervical, thoracic, or lumbar vertebrae. Synonym: vertebra vera. (05 Mar 2000) |