chromaticityn.

1904 tr. L. Launoy in Jrnl. Royal Microsc. Soc. 170 Active phenomena [in poison- or digestive glands]—variations of chromaticity [etc.].

1934 L. W. Sharp Introd. Cytol. (ed. 3) xiii. 195 Small bodies in the cytoplasm which resemble nuclear matter in composition and chromaticity.

1922 L. T. Troland in Jrnl. Optical Soc. Amer. 6 535 The term chromaticity may be used to characterize a color qualitatively without reference to its brilliance. Chromaticity is determined by hue and saturation together, a gray being specified by the statement that it has no chromaticity.

1932 A. C. Hardy & F. H. Perrin Princ. Optics xiv. 306 To specify the color of a material completely, it is necessary to give not only the chromaticity but also the luminosity.

1944 W. D. Wright Measurem. Colour iii. 60 The chromaticity diagram in which the colour quality of a stimulus is defined in terms of two co-ordinates.

1951 Engineering 27 July 105/1 Their new colorimeter..suitable for measuring..chromaticity co-ordinates.

1955 G. G. Gouriet Introd. Colour Television i. ii. 22 The principle of superposition applies to our perception of colour in terms of both luminance and chromaticity, a principle which is rarely encountered in physiological processes.

1957 R. W. G. Hunt Reprod. Colour viii. 79 Subjective terms denote the appearance of the colour to an observer... Objective terms relate to quantities obtained with measuring instruments... Subjective Term: Hue and Saturation. Objective Term: Chromaticity.