axis vertebra

English Thesaurus

1. the 2nd cervical vertebra; serves as a pivot for turning the head (noun.body)

hypernym	:	cervical vertebra, neck bone,
definition	:	one of 7 vertebrae in the human spine located in the neck region (noun.body)

part holonym	:	odontoid process,
definition	:	a toothlike process at the back of 2nd vertebra of the neck (noun.body)