dichotomy
- n being twofold; a classification into two opposed parts or subclasses
the dichotomy between eastern and western culture
dichroism
- n pleochroism of a crystal so that it exhibits two different colors when viewed from two different directions
dichromacy
- n a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision)
dichromasy
- n a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision)