trichroism noun. ['trʌɪkrǝʊɪz(ǝ)m] M19.
[from Greek trikhroos, trikhrous three-coloured + -ISM.]
1. Crystallography & Mineralogy. Pleochroism resulting in the appearance of three different colours when viewed in three crystallographic directions. M19.

2. Zoology. The occurrence of three markedly distinct colour varieties of a species. rare. L19.

■ tri'chroic adjective exhibiting or pertaining to trichroism L19.

[TahlilGaran] English Dictionary ▲