subfactorial

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Definitions of subfactorial word

noun subfactorial the number of ways a group of objects can be arranged so that none of the objects are in their original or correct place 0
noun subfactorial (mathematics, combinatorics) The result of deranging a number. In equations, it is usually symbolised by an exclamation mark (!) before the number being deranged (as opposed to factorials, where the exclamation mark occurs after the number). 0

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exclamation

A common word. It’s meaning is known to most children of preschool age. About 92% of English native speakers know the meaning and use the word.

Most Europeans know this English word. The frequency of it’s usage is somewhere between "mom" and "screwdriver".

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