n. [ Azote + -meter. ] (Chem.) An apparatus for measuring or determining the proportion of nitrogen; a nitrometer. [ 1913 Webster ]
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 ]