Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Axis
Medically reviewed by Min Clinic Staff | Updated: January 2026
Axis: The axis is the second cervical vertebra (symbol: C2). It is called the "axis" because the uppermost cervical vertebra (called the atlas) rotates about the odontoid process of C2. The joint between the axis and atlas is a pivot type of joint. It allows the head turn.
The Latin word "axis" means axle or pole. The axis bone serves as the axle about which the atlas (and the head) turn.