noun (n)

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

  menjadi dua; golongan yang menentang menjadi dua bagian atau subclasses

  Example:
  The dichotomy between eastern and western culture.
  

  Synonym:
  duality
  

  source: wordnet30
• A cutting in two; a division.

  a memotong dalam dua; divisi.

  source: webster1913