factorial

• IPA^(key): /fækˈtɔːɹi.əl/

factorial (plural factorials)

1. (mathematics, combinatorics) The result of multiplying a given number of consecutive integers from 1 to the given number. In equations, it is symbolized by an exclamation mark (!). For example, 5! = 1 × 2 × 3 × 4 × 5 = 120.

"n!" is read as "factorial of n" or "n factorial."

• double factorial
• falling factorial
• rising factorial

factorial (comparative more factorial, superlative most factorial)

1. (mathematics) Of or pertaining to a factor or factorial.
2. Of or pertaining to a factor, a kind of business agent.
   • 2004, The Digest: Annotated British, Commonwealth, and European Cases

     The latter sold the goods to a customer who was cashier to certain creditors of the agents without disclosing the factorial capacity in which they acted.

3. (dated) Of or pertaining to a factory.

   (Can we find and add a quotation of Buchanan to this entry?)

• primorial

• factorial on Wikipedia.Wikipedia

• factorial in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.
• factorial in The Century Dictionary, New York, N.Y.: The Century Co., 1911.

factorial m (plural factoriais)

1. Alternative spelling of fatorial (superseded in Brazil by the 1943 spelling reform, and by the Orthographic Agreement of 1990 elsewhere. Still used in countries where the agreement hasn’t come into effect, and as an alternative spelling in Portugal, where the agreement came into effect in May 2009.)

factorial m or f (plural factoriais, comparable)

1. Alternative spelling of fatorial (superseded in Brazil by the 1943 spelling reform, and by the Orthographic Agreement of 1990 elsewhere. Still used in countries where the agreement hasn’t come into effect, and as an alternative spelling in Portugal, where the agreement came into effect in May 2009.)

factorial m (plural factoriales)

1. (mathematics) factorial