# Pfaffian

> English word · Noun · IPA /ˈfæfɪən/

## Definitions
1. The determinant of a skew-symmetric matrix, capable of being written as the square of a polynomial in the matrix entries.

## Etymology
From Pfaff + -ian, after Johann Friedrich Pfaff.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/pfaffian