— factorially , adv.
/fak tawr"ee euhl, -tohr"-/ , n.
1. Math. the product of a given positive integer multiplied by all lesser positive integers: The quantity four factorial (4!) = 4 · 3 · 2 · 1 = 24. Symbol: n!, where n is the given integer.
adj.
2. Math. of or pertaining to factors or factorials.
3. of or pertaining to a factor or a factory.
[ 1810-20; FACTOR + -IAL ]