factorials

/F AE0 K T AO1 R IY0 AH0 L Z/
noun
  1. 1

    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.

Source: https://en.wiktionary.org/wiki/factorial, https://en.wiktionary.org/wiki/factorials