WordReference Random House Unabridged Dictionary of American English © 2017
ce•ru•le•an  (sə ro̅o̅lē ən),USA pronunciation adj., n. 
  1. deep blue;
    sky blue;
  2. Heraldrya sky-blue tincture, used esp. on the Continent.
  • Latin caerule(us) dark blue, azure (akin to caelum sky) + -an
  • 1660–70

Collins Concise English Dictionary © HarperCollins Publishers::

cerulean /sɪˈruːlɪən/ n
  1. a deep blue colour; azure
Etymology: 17th Century: from Latin caeruleus, probably from caelum sky

'cerulean' also found in these entries:

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