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1. Oxford Dictionary

   factorial

   • IPA[fakˈtɔːrɪəl]

   英式

   • n.
     the product of an integer and all the integers below it; e.g. factorial four (4!) is equal to 24.；the product of a series of factors in an arithmetical progression.
   • adj.
     relating to a factor or factorial

   • noun: factorial, plural noun: factorials

2. • 釋義

   n.

   名詞

   • 1. the product of an integer and all the integers below it; e.g. factorial four (4!) is equal to 24.
   • ▪ the product of a series of factors in an arithmetical progression.

   adj.

   形容詞

   • 1. relating to a factor or factorial a factorial design