monochromate

Century Dictionary and Cyclopedia

1. n. In chem., a normal chromate, as of potassium, K₂CrO₄, in contradistinction to a dichromate or pyrochromate, as K₂Cr₂O₇: the former may be viewed as K₂O.CrO₃, and the latter as K₂O.2CrO₃.
2. n. In psychology, a totally color-blind person; one who is afflicted with monochromasy.