- metachromatism
- "Change of the colour of hair, skin, etc. Now rare", Late 19th cent. From meta- + chromatism; in later use in sense 1 probably after French métachromatisme, although in quot. 1876 at sense 1b apparently an independent formation.
- parachromatism
- "Colour blindness", Mid 19th cent.; earliest use found in Richard Taylor (?1805–1873).