Definition of "absorbance" []

• (physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation (noun)

WordNet. Princeton University. 2010.

• "EDRF, maximum absorbance moved to a new wave-length; and exposed to NO, exactly the same shift in absorbance occurred!"
• "Remarkably, the new technique, which the researchers call absorbance modulation, makes it possible to create lines that are only about one-tenth as wide as the wavelength of light used to create them."
• "These properties are called absorbance - (a) and reflectance - (r)."