Spectrophotometry Spec`tro*pho*tom"e*try, n. 1. The art of comparing, photometrically, the brightness of two spectra, wave length by wave length; the use of the spectrophotometer. [Webster 1913 Suppl.]

2. (Chem., Physics) the art or process of measuring the degree of absorption of light at different wavelengths by a chemical substance, by means of a spectrometer or spectrophotometer. It is a technique for chemical analysis. [PJC] -- {Spec`tro*pho`to*met"ric}, a. [Webster 1913 Suppl.]

The Collaborative International Dictionary of English. 2000.

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