1. [ noun ] (geometry) the interchangeability of the roles of points and planes in the theorems of projective geometry
Related terms: exchangeability geometry
2. [ noun ] being twofold; a classification into two opposed parts or subclasses
Synonyms: dichotomy

: "the dichotomy between eastern and western culture"

Related terms: classification dichotomize
3. [ noun ] (physics) the property of matter and electromagnetic radiation that is characterized by the fact that some properties can be explained best by wave theory and others by particle theory
Synonyms: wave-particle_duality
Related terms: property physics
Similar spelling:   duluth