Photometer

Pho*tom"e*ter

(?), n. [Photo- + -meter: cf. F. photomtre.] (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]

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Pho`to*met"ric

(?),

Pho`to*met"ric*al

(?), } a. [Cf. F. photomtrique.] Of or pertaining to photometry, or to a photometer.
[1913 Webster]

 

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Tue 11th December 2018