noun
: a defect in the lattice structure of a usually transparent crystal that causes light of only one color to be transmitted by the part of the crystal in which the defect is located
noun
: a defect in the lattice structure of a usually transparent crystal that causes light of only one color to be transmitted by the part of the crystal in which the defect is located
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012