absorbance.
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.
Meaning & usage
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.
Where this word comes from
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 *-onts Latin -ns Latin -āns Proto-Indo-European *-(i)yós Proto-Italic *-ijos Proto-Italic *-ios Old Latin -ios Latin -ius Latin -ia Latin -āntia Old French -ancebor. Middle English -aunce English -ance English absorbance From absorb + -ance.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.