factorial
[ faktawreeuh l, tohr ]
/ fækˈtɔr i əl, ˈtoʊr /

noun
Mathematics. 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.
adjective
Nearby words
factor x, factor xi, factor xii, factor xiii, factorage, factorial, factorial experiment, factorially, factoring, factorize, factory
Related formsfac·to·ri·al·ly, adverb
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for factorial
These phenomena demonstrate the existence of a complex interrelation between the factorial units.
The Organism as a WholeJacques LoebIn its place stands the factorial hypothesis, evolved by workers in America, England, and France at about the same time.
Applied EugenicsPaul Popenoe and Roswell Hill JohnsonIt is by no means unlikely that various dark forms of lubricipeda correspond with a progressive series of factorial additions.
Problems of GeneticsWilliam BatesonThe possible connections within it were factorial one hundred thousand.
Unwise ChildGordon Randall Garrett
British Dictionary definitions for factorial
factorial
/ (fækˈtɔːrɪəl) maths /
noun
the product of all the positive integers from one up to and including a given integer. Factorial zero is assigned the value of one: factorial four is 1 × 2 × 3 × 4 . Symbol: n !, where n is the given integer
adjective
of or involving factorials or factors
Derived Formsfactorially, adverb
Collins English Dictionary  Complete & Unabridged 2012 Digital Edition
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Word Origin and History for factorial
Online Etymology Dictionary, © 2010 Douglas Harper
Science definitions for factorial
factorial
[ făktôr′ēəl ]
The product of all of the positive integers from 1 to a given positive integer. It is written as the given integer followed by an exclamation point. For example, the factorial of 4 (written 4!) is 1 X 2 X 3 X 4, or 24.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.