Such a division involving apparently incompatible or opposite principles; a duality.
The division of a genus into two species; a division into two subordinate parts.
A phase of the moon when it appears half lit and half dark, as at the quadratures.
A separation or division into two; a distinction that results in such a division.
The division of a class into two disjoint subclasses that are together comprehensive, as the division of man into white and not white.
Division and subdivision; bifurcation, as of a stem of a plant or a vein of the body into two parts as it proceeds from its origin; often successive.
Duality; the condition of being double.
The belief that the world is ruled by a pair of antagonistic forces, such as good and evil; the belief that man has two basic natures, the physical and the spiritual.
The view that the world consists of, or is explicable in terms of, two fundamental principles, such as mind and matter or good and evil.