Reflectance values express the percentage of light that is reflected back from a surface, the difference having been absorbed or transmitted by the surface.
Definition of AXIAL. 1. : of, relating to, or having the characteristics of an axis.
Atlanto-axial joint. Search. The atlanto-axial joint is a joint between the first and second cervical vertebrae; the Atlas and Axis. It is a complex joint made up of three synovial joints and constitutes the most mobile articulation of the spine.otions Available. Rotation is the primary movement at this joint - 50% of cervical rotation (50Â°) comes from the atlanto-axial articulation. This is allowed by the pivot articulation between the odontoid process of the axis and the ring formed by the anterior arch and the transverse ligament of the atlas.