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absorbance

noun

  1. the ability of a layer of a substance to absorb radiation expressed mathematically as the negative common logarithm of transmittance
L1492283 on Wikidata ↗

Wiktionary

Pronunciation: /əbˈsɔɹ.bn̩s/ / /əbˈzɔɹ.bn̩s/ / /əbˈsɔɹ.bn̩ts/

noun

Etymology: Etymology tree Proto-Indo-European *h₂ep Proto-Indo-European *-o Proto-Indo-European *h₂epó Proto-Italic *ap Latin abder. Latin ab- Proto-Indo-European *srebʰ- Proto-Indo-European *-yeti Proto-Indo-European *-éyeti Proto-Indo-European *srobʰéyeti Proto-Italic *sorβeō Latin sorbeō Latin absorbeō Old French assorbir Middle French absorberder. English absorb Proto-Indo-European *-yós Proto-Italic *-ios Old Latin -ios Latin -ius Latin -iader. Old French -ancebor. Middle English -aunce English -ance English absorbance From absorb + -ance.

  1. 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.