[spek-troh-foh-tom-i-ter] /ˌspɛk troʊ foʊˈtɒm ɪ tər/
an instrument for making photometric comparisons between parts of spectra.
an instrument for producing or recording a spectrum and measuring the photometric intensity of each wavelength present, esp such an instrument used for infrared, visible, and ultraviolet radiation See also spectrometer

spectrophotometer spec·tro·pho·tom·e·ter (spěk’trō-fō-tŏm’ĭ-tər)
An instrument for measuring the intensity of light of a definite wavelength transmitted by a substance or a solution, thus providing a measure of the amount of material in the solution absorbing the light.
spec’tro·pho’to·met’ric (-fō’tə-mět’rĭk) adj.


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