- dichroism [dī′krō iz΄əm]n.[< Gr dichroos, of two colors < di-, two + chrōs, skin, complexion, color (for IE base see CHROMA) + -ISM]1. the property that doubly refracting crystals have of transmitting light of different colors when looked at from different angles2. the property of a substance of transmitting light of different colors depending on its thickness or on its concentration in solution3. the property of a substance of having one color when it reflects light and another when it transmits light
English World dictionary. V. Neufeldt. 2014.