colorimetry
  色度學
  col·or·im·e·try /ˌkələˈrɪmətrɪ/ 名詞
  比色法,比色測定法,色覺檢查,比色計
  Col·or·im·e·try n.
  1.  The quantitative determination of the depth of color of a substance.
  2.  A method of quantitative chemical analysis based upon the comparison of the depth of color of a solution with that of a standard liquid.
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  colorimetry
       n : quantitative chemical analysis by color using a colorimeter
           [syn: colorimetric analysis]