I. fakˈtōrēəl, -tȯr- adjective
Etymology: factor (I) + -ial
1.
a. : of, relating to, or involving the use of factorials
factorial mathematics
b. : involving or based on replication with a variable introduced in each replicate
a factorial experiment
factorial study of mental processes
2. : of, relating to, or involving a factor
advantages of factorial supervision of an estate
• fac·to·ri·al·ly -ēəlē, -li adverb
II. noun
( -s )
Etymology: factor (I) + -ial
: a function of a positive integer n denoted by n! and defined by the relation n!.1.2.3…n with the convention that 0! is usually assigned the value one