dichromicadj.

1836 J. F. W. Herschel Diary 7 Dec. in D. Evans Herschel at Cape (1969) 266 Read them a lecture on Dichromic Vision & shewed them Dalton's book of Colours.

1854 Fraser's Mag. 50 559 Such Dichromic visionaries must lose a great deal. The harmonies of colour cannot touch them.

1881 J. Le Conte Sight 63 Herschel regarded normal vision as trichromic, but the vision of Dalton as dichromic, the red being wanting.

1913 F. W. Edridge-Green in Proc. Royal Soc. 1912–13 B. 86 164 I have classified the colour-perception of individuals as dichromic, trichromic, tetrachromic, pentachromic, hexachromic, and heptachromic.

2009 L. P. Villarreal Origin Group Identity i. 21 In the prosimian ancestors, both dichromic color vision and the VNO [= vomeronasal] organ have been preserved.

1860 W. A. Miller Elements Chem. (ed. 2) I. iv. 144 Even in dichromic media, or solutions which, under certain circumstances, appear to the unaided eye to transmit light of one tint, and, under certain other circumstances, to transmit light of a different tint, this law generally holds good.

1922 A.S.T.A. Jrnl. Mar. 43 In chemical combination with developer..it causes a deposit of colloidal silver—the familiar ‘dichromic fog’ which appears as a red stain by transmitted light, as a green stain by reflected light.

1995 S. E. Wilkinson & T. J. Hallam in D. A. Kendall & S. J. Hill Signal Transduction Protocols xxi. 266 An excitation filter at 485 ± 5.2 nM, a dichromic filter at 500 nM, and a long-pass filter at 530 nM proved most suitable.

2008 M. G. Ryadnov et al. in E. Gazit & R. Nussinov Nanostructure Design iii. 39 Carl Zeiss Vision wide-field microscope fitted with x10 and x40 LD lenses, a krypton/argon mixed-gas laser, a dichromic mirror, and two filters.