# Jaccard index

> English word · Noun

## Definitions
1. A statistic for gauging the similarity and diversity of sample sets, based on the size of the intersection between the sets divided by the size of the union of the sets.

## Etymology
Developed by Swiss botanist Paul Jaccard (1868–1944), who gave it the French name coefficient de communauté.

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