absorbance

absorbance /ab·sor·bance/ (-sor´bans)

1. in analytical chemistry, a measure of the light that a solution does not transmit compared to a pure solution. Symbol .

2. in radiology, a measure of the ability of a medium to absorb radiation, expressed as the logarithm of the ratio of the intensity of the radiation entering the medium to that leaving it.

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ab·sorb·ance (b-zôrbns) or ab·sorb·an·cy or ab·sorb·en·cy (b-zôrbn-s)

n.

Abbr. A In spectrophotometry, equal to 2 minus the log of the percentage transmittance of light. Also called extinction, optical density.

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absorbance

in radiology, a measure of the ability of a medium to absorb radiation, expressed as the logarithm of the quotient of the intensity of the radiation entering the medium divided by that leaving it.