attenuance, \(D\)

https://doi.org/10.1351/goldbook.A00513
Analogous to absorbance, but taking into account also the effects due to scattering and luminescence. It was formerly called extinction.
Source:
Green Book,2nd ed., p. 32 (https://www.cintegrado.com.br/site/documentos/green_book_2ed.pdf)