Adjective cerulean has 1 sense
  1. azure, cerulean, sky-blue, bright blue - of a deep somewhat purplish blue color similar to that of a clear October sky; "October's bright blue weather"
    Antonym: achromatic (indirect, via chromatic)
,Noun cerulean has 1 sense
  1. azure, cerulean, sapphire, lazuline, sky-blue - a light shade of blue
    --1 is a kind of blue, blueness
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