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[suh-roo-lee-uh n] /səˈru li ən/
adjective, noun
deep blue; sky blue; azure.
Heraldry. a sky-blue tincture, used especially on the Continent.
Origin of cerulean
1660-70; < Latin caerule(us) dark blue, azure (akin to caelum sky) + -an Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for cerulean
Contemporary Examples
Historical Examples
  • Or the cerulean borrowed from the tint of the southern indigo.

    Man of Uz, and Other Poems Lydia Howard Sigourney
  • And out of these shone, shone on us, the cerulean and sapphire glory!

  • Let me know whether you intend to wear one of your cerulean shades.

  • So we went, all of us, back through vast woodland to cerulean water.

    1492 Mary Johnston
  • Blue, blue, as if the sky let fallA flower from its cerulean wall!

    The Garden, You, and I Mabel Osgood Wright
  • And they seemed to envelop her in a flash of cerulean light.

    The Torrent Vicente Blasco Ibaez
  • They were not looking at the bay, exquisite as it was in its cerulean beauty.

    Flood Tide

    Sara Ware Bassett
  • Beatrix dug her cerulean parasol deep into the pine-needles and sighed.


    O. Henry
  • The cerulean tint seems much rarer among the feathered tribes there than here.

    Wake-Robin John Burroughs
British Dictionary definitions for cerulean


  1. a deep blue colour; azure
  2. (as adjective): a cerulean sea
Word Origin
C17: from Latin caeruleus, probably from caelum sky
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for cerulean

1660s, with -an + Latin caeruleus "blue, dark blue, blue-green," perhaps dissimilated from caelulum, diminutive of caelum "heaven, sky," of uncertain origin (see celestial). The Latin word was applied by Roman authors to the sky, the Mediterranean, and occasionally to leaves or fields. As a noun, from 1756.

Online Etymology Dictionary, © 2010 Douglas Harper
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