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Added 10 October 2026

cerulean

/səˈɹuːli.ən/ noun

Latin root: caeruleus Wiktionary

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about cerulean at Wordnik → Where our words come from →

A light shade of blue.

adjective

Of a deep somewhat purplish blue color similar to that of a clear October sky.
October's bright blue weather

Origin

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

From Wiktionary, via Kaikki.org (CC BY-SA)

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