(n) a photometer that can be used to locate and identify chemical compounds in a cell by measuring the intensity of the light that passes through stained sections of the cytoplasm
n. [ Photo- + -meter: cf. F. photomètre. ] (Physics) An instrument for measuring the intensity of light, or, more especially, for comparing the relative intensities of different lights, or their relative illuminating power. [ 1913 Webster ]
n. [ Spectrum + photometer. ] 1. (Opt.) An instrument for measuring or comparing the intensities of the colors of the spectrum. [ 1913 Webster ]
2. (Chem., Physics) An analytical instrument for measuring the degree of absorption of light at different wavelengths by a chemical substance. A specific pattern of absorption intensities at a series of wavelengths is a characteristic of each different chemical substance. [ PJC ]
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