Physics The ratio of the energy of a wave reflected from a surface to the energy possessed by the wave striking the surface.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "reflectivity" in a sentence
"We change it back over to what we call reflectivity where you just kind of see the rain shower of it."
"As it quiets, the skin lightens and the reflectivity is less noticeable."
"While much of the reflectivity was a natural consequence of the silicate composition of the growths, some of it was intentional."