# Reuleaux triangle

> English word · Noun

## Definitions
1. A figure consisting of three circular arcs, each centered on the intersection of the other two.

## Etymology
Named after Franz Reuleaux, 19th-century German engineer, who used Reuleaux triangles in his machine designs.

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