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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. 2015.
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Examples from the web for cerulean
  • Darkening cerulean blue above, a redness along the tree line.
  • Her eyes are cerulean, her bone structure is extraordinary and she's effortlessly stylish.
  • cerulean warblers molt into an adult plumage prior to the breeding season following their hatching year.
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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