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.
Several other terms are also used to describe location. These terms are not used to form the fixed axes. Terms include: 1  Axial (Latin: axis, from Greek: axÅn axle): around the central axis of the organism or the extremity.