DUALITY

• (noun) (geometry) the interchangeability of the roles of points and planes in the theorems of projective geometry

• (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

• (noun) being twofold; a classification into two opposed parts or subclasses

  "the dichotomy between eastern and western culture"

  synonyms : dichotomy

WordNet® 3.0, © 2006 by Princeton University.

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