Duality

Noun

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

Etymology
From dualitas:.

Synonyms

 * dichotomy

Derived terms

 * wave-particle duality

Translations

 * Finnish: kaksijakoisuus, kaksinaisuus


 * Persian: زوجیت


 * French: dualité


 * Portuguese: dualidade


 * Bulgarian: дуализъм
 * Finnish: duaalisuus
 * French: dualité


 * Persian: زوجیت
 * Portuguese: dualidade