duality

From Latin duālitās.

From dual +‎ -ity.

• IPA^(key): /d(j)uːˈælɪti/

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• Rhymes: -ælɪti

duality (countable and uncountable, plural dualities)

1. A classification into two subclasses or opposed parts.
2. (projective geometry) The interchangeability of points and planes.
3. (mathematics, physics) The mathematical equivalence of two seemingly different theoretical descriptions of a physical system.

• dichotomy