[fak-tawr-ee-uh l, -tohr-]
- 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.
Origin of factorial
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for factorial
The possible connections within it were factorial one hundred thousand.Unwise Child
Gordon Randall Garrett
It is by no means unlikely that various dark forms of lubricipeda correspond with a progressive series of factorial additions.Problems of Genetics
These phenomena demonstrate the existence of a complex interrelation between the factorial units.The Organism as a Whole
In its place stands the factorial hypothesis, evolved by workers in America, England, and France at about the same time.Applied Eugenics
Paul Popenoe and Roswell Hill Johnson
- 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
- of or involving factorials or factors
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for factorial
Online Etymology Dictionary, © 2010 Douglas Harper
- 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.
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