absorbance /əbˈzɔːb(ə)ns, əbˈsɔːb(ə)ns/



[Physics] a measure of the capacity of a substance to absorb light of a specified wavelength. It is equal to the logarithm of the reciprocal of the transmittance.

a plot of absorbance versus wavelength would give a Gaussian curve.
[ count noun]
absorbances were recorded with a clinical photometer.

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