Dual may refer to:

  • a pair or a grouping of two:
    • dual number, a grammatical construct in some languages

dual fertilization, simultaneous application of a P-type and N-type fertilizer

  • dual diagnosis, a psychiatric diagnosis of co-occurrence of substance abuse and a mental problem
  • DUAL table, a special kind of one-row and one-column database table
  • an acronym (DUAL):
  • a proper name:
    • Dual, a manufacturer of Hifi equipment
    • Dual!, an anime series
  • duality, a property of something with two states:
  • Dual is also:
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