Factorial
WordNet
adjective
(1) Of or relating to factorials
noun
(2) The product of all the integers up to and including a given integer
"1, 2, 6, 24, and 120 are factorials"
WiktionaryText
Noun
- 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.