DUALITY

duality

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

duality, wave-particle duality

(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

dichotomy, duality

(noun) being twofold; a classification into two opposed parts or subclasses; “the dichotomy between eastern and western culture”

Source: WordNet® 3.1

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Etymology

Noun

duality (countable and uncountable, plural dualities)

A classification into two subclasses or opposed parts.

(projective geometry) The interchangeability of points and planes.

(mathematics, physics) The mathematical equivalence of two seemingly different theoretical descriptions of a physical system.

Synonyms

• dichotomy

Source: Wiktionary

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Du"al"i*ty, n. Etym: [L. dualitas: cf. F. dualité.]

Definition: The quality or condition of being two or twofold; dual character or usage.

Source: Webster’s Unabridged Dictionary 1913 Edition

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