Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Coloursceruleance‧ru‧le‧an /səˈruːliən/ (also cerulean blue) noun [uncountable] literary CCa deep blue colour like a clear sky —cerulean adjectiveOrigin cerulean (1600-1700) Latin caeruleus “dark blue”, probably from caelum; → CELESTIAL ldoceonline.com
