SUBFACTORIAL
Etymology
Noun
subfactorial (plural subfactorials)
(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).
Source: Wiktionary
Recent Word Finds
Word of the Day
2 June 2025
FOOTING
(noun) status with respect to the relations between people or groups; “on good terms with her in-laws”; “on a friendly footing”
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