Source : Webster's Revised Unabridged Dictionary (1913)

Colorimeter \Col`or*im"e*ter\, n. [Color + -meter: cf. F.
   colorim[`e]tre.]
   An instrument for measuring the depth of the color of
   anything, especially of a liquid, by comparison with a
   standard liquid.

Source : WordNet®

colorimeter
     n : a measuring instrument used in colorimetric analysis to
         determine the quantity of a substance from the color it
         yields with specific reagents [syn: {tintometer}]