absorptivity

noun

Etymology: Etymology tree Latin absorbeō Old French assorbir Middle French absorberder. English absorb Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-tós Proto-Indo-European *-eh₂tos Proto-Italic *-ātos Latin -ātuslbor. English -ate Latin -īvus Old French -ifbor. Middle English -yf English -ive English -ative English -tive English absorptive Proto-Indo-European *-teh₂ Proto-Indo-European *-ts Proto-Indo-European *-teh₂ts Latin -itāsder. Old French -itebor. Middle English -ite English -ity English absorptivity From absorptive + -ity.

1. The quality of being absorptive; absorptiveness.
2. The fraction of radiation absorbed by a surface to the total radiation incident on the surface.
3. The constant a in the Beer's law relation A = abc, where A is the absorbance, b the path length, and c the concentration of solution. Also known as absorptive power. Formerly known as absorbency index; absorption constant; extinction coefficient.