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absorbance

American

[ab-sawr-buhns, -zawr-] / æbˈsɔr bəns, -ˈzɔr- /

Also absorbancy

noun

Physics.

the capacity of a substance to absorb radiation, expressed as the common logarithm of the reciprocal of the transmittance of the substance.

absorbance British

/ əbˈsɔːbəns, -ˈzɔː- /

noun

physics a measure of the light-absorbing ability of an object, expressed as the logarithm to base 10 of the reciprocal of the internal transmittance See transmittance

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of absorbance

First recorded in 1945–50; absorb(ent) + -ance

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The new method monitors neutral lipids within LDs directly by detecting changes in IR absorbance.

From Science Daily • Jan. 24, 2024

A photochemistry lab at Harvard collaborated in the research by providing measurements of the UV absorbance patterns of ferric iron under extreme acidic conditions, in an attempt to mimic the even more extreme Venusian clouds.

From Science Daily • Jan. 5, 2024

The maximum absorbance corresponds to Δoct and occurs at 499 nm.

From Textbooks • Feb. 14, 2019

Units of maximum velocity are 10 absorbance units at 600 nm per minute per microgram of protein.

From Nature • Apr. 4, 2014

By contrast, the EWG rated products based on the "absorbance spectrum" of active ingredients and existing data on their stability.

From Time • May 25, 2011

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023