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 pho·tom·e·ter /foˈtɑmətɚ/
 光度計,曝光計

 pho·tom·e·ter /foˈtɑmətɚ/ 名詞
 光度計,分光計

 photometer
 光度計

 photometer
 *光度計

 Pho·tom·e·ter n.  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.
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 photometer
      n 1: measuring instrument for measuring the luminous intensity of
           a source by comparing it (visually or photoelectrically)
           with a standard source
      2: photographic equipment that measures the intensity of light
         [syn: light meter, exposure meter]