noun see: refract Date: 1898 the refraction of light in an anisotropic material (as calcite) in two slightly different directions to form two rays, birefringent adjective
BIREFRINGENCE
Meaning of BIREFRINGENCE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012