spectrophotometer
Pronunciation: spek′trō-fō-tom′ĕ-tĕr
An instrument for measuring the intensity of light of a definite wavelength transmitted by a substance or a solution, giving a quantitative measure of the amount of material in the solution absorbing the light; a colorimeter with a choice of wavelength and photometric measurement.
spectrocolorimeter
Pronunciation: spek′trō-kŏl′ŏr-im′ĕ-tĕr
A colorimeter using a source of light from a selected portion of the spectrum, of a selected wavelength.
colorimeter
Pronunciation: kŭl′ŏr-im′ĕ-ter
An optic device for determining the color and/or intensity of the color of a liquid.
Synonym(s): chromatometer, chromometer