DICT.TW Dictionary Taiwan

 du·al·i·ty /duˈæləti ||dju-/
 二元性

 duality
 對偶性

 duality
 自偶性

 duality
 對偶性

 Du·al·i·ty n.  The quality or condition of being two or twofold; dual character or usage.
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 duality
      n 1: being twofold; a classification into two opposed parts or
           subclasses; "the dichotomy between eastern and western
           culture" [syn: dichotomy]
      2: (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 [syn: wave-particle duality]
      3: (geometry) the interchangeability of the roles of points and
         planes in the theorems of projective geometry