Pronunciation: ber lam'bert
the absorbance of light is directly proportional to the thickness of the media through which the light is being transmitted multiplied by the concentration of absorbing chromophore; A = ebc where A is the absorbance, e is the molar extinction coefficient, b is the thickness of the solution, and c is the concentration.
[August Beer, Johann Heinrich Lambert]
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Examples: glitazone, GI cocktail, etc.