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.
Define axis. axis synonyms, axis pronunciation, axis translation, English dictionary definition of axis. n. pl. axÂ·es 1. A straight line about which a body or geometric object rotates or may be conceived to rotate. 2. Mathematics a. An unlimited line,...