fac ‧ to ‧ ri ‧ al /fækˈtɔːriəl/ BrE AmE noun [countable] technical
the result when you multiply a whole number by all the numbers below it:
factorial 3 = 3 x 2 x 1
fac ‧ to ‧ ri ‧ al /fækˈtɔːriəl/ BrE AmE noun [countable] technical
the result when you multiply a whole number by all the numbers below it:
factorial 3 = 3 x 2 x 1
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012