# isosceles

> English word · Adjective · IPA /aɪˈsɒsəliːz/ · frequency rank #74,204

## Definitions
1. Having (at least) two sides of equal length, used especially of a triangle or trapezoid.

## Etymology
Borrowed from Latin īsoscelēs, from Ancient Greek ἰσοσκελής (isoskelḗs, “equal-legged”), from ἴσος (ísos, “equal”) + σκέλος (skélos, “leg”) + -ής (-ḗs, adjective suffix).
See also iso-.

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