'reflectivity' definitions:

Definition of 'reflectivity'

From: WordNet
noun
The fraction of radiant energy that is reflected from a surface [syn: coefficient of reflection, reflection factor, reflectance, reflectivity]
noun
The ability to reflect beams or rays [syn: reflection, reflexion, reflectivity]
noun
The capability of quiet thought or contemplation [syn: reflectiveness, reflectivity]