# cerulean

> English word · Noun · IPA /səˈɹuːli.ən/ · frequency rank #66,550

## Definitions
1. A greenish-blue color.
2. Any of various lycaenid butterflies of the genus Jamides.

## Etymology
From Latin caeruleus (“blue”) + -an, from caelum (“sky, heaven”) + -uleus (diminutive suffix).

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