axis[ak′sis, ak′sēz]


1. A straight line joining two opposing poles of a spheric body, about which the body may revolve.
2. The central line of the body or any of its parts.
3. The second cervical vertebra.
4. The vertebral column.
5. The central nervous system.
6. An artery that divides, immediately on its origin, into a number of branches, celiac axis.

vertebra C2 , epistropheus , odontoid vertebra , second cervical vertebra , toothed vertebra , vertebra dentata

See: trunk

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