Poisson

P3O1I1S1S1O1N1
UK/ˈpwɑː.sɒn/UK/ˈpwɑː.sɒ̃/US/ˈpwɑ.sɒn/

proper noun

A surname in French

OriginFrench Poisson →
Less commonScrabble 9
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Meanings

proper noun
  1. A surname in French
nounPoisson (plural Poissons)

plural Poissons

  1. mathematicsThe Poisson distribution.

Origin

  1. FrenchPoisson
  2. EnglishPoisson

Unadapted borrowing from French Poisson. The noun sense is named after French mathematician Siméon Denis Poisson (1781–1840).

More words from French

Full word history & related roots →
Cite this entry
APA

Poisson. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/Poisson

MLA

“Poisson.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Poisson. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “Poisson,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/Poisson.

Source: Poisson on Wiktionary, CC BY-SA 4.0.