[f. L. colōr-em color + -METER, Gr. μέτρον measure: cf. F. colorimètre.] An instrument for measuring intensity of color.
1863–72. Watts, Dict. Chem., Colorimeter, an instrument for measuring the depth of colour in a liquid by comparison with a standard liquid of the same tint.
1883. Sidereal Messenger, II. 194. Observations made … with the Zollner photometer and colorimeter.
Hence Colorimetric, -metrical a., of or pertaining to a colorimeter, or to Colorimetry, the measurement of the intensity of color.
1881. Athenæum, 26 Nov., 706/1. Spectroscopic and colorimetric observations of fixed stars and planets.
1881. Nature, XXV. 46. Colorimetrical methods are not sensitive enough.
