The Collaborative International Dictionary
Spectrophotometric
Spectrophotometry \Spec`tro*pho*tom"e*try\, n.
The art of comparing, photometrically, the brightness of two spectra, wave length by wave length; the use of the spectrophotometer.
(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.
Wiktionary
spectrophotometric
a. (context analytical chemistry English) Of, or relating to spectrophotometry, or measured by a spectrophotometer.