Photometer

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Photometer \Pho*tom"e*ter\, n. [Photo- + -meter: cf. F.
     photom[`e]tre.] (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] Photometric



From WordNet (r) 2.0 [wn]:

  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}]