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absorbance

Today it means: A logarithmic measure of the amount of light that is absorbed when passing through a substance; the capacity of a substance to absorb light of a given wavelength; optical density. Full definition →

First used First attested in the mid 20ᵗʰ century.English absorb ← Middle French absorber ← Old French assorbir

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Proto-Indo-European*h₂ep
Proto-Indo-European*h₂epó
Proto-Italic*ap
Latinab
Latinab-
Proto-Indo-European*srebʰ-
Proto-Indo-European*srobʰéyeti
Proto-Italic*sorβeō
Latinsorbeō
Latinabsorbeō
Old Frenchassorbir
Middle Frenchabsorber
Englishabsorb
English todayabsorbance

From absorb + -ance.

First known use, by meaning

First attested in the mid 20ᵗʰ century. A logarithmic measure of the amount of light that is absorbed when passing through a substance; the capacity of a substance to absorb light of a given wavelength; optical density.

Etymology from Wiktionary, CC BY-SA 4.0.