Plural of azure; multiple instances of the color blue, or regions of blue (like sky or sea), or blue pigments.
From 'azure' (bright blue, from Persian 'lāžuvard' for lapis lazuli stone) plus the plural suffix '-s.' In heraldry, azures are the blue elements in coats of arms.
In medieval manuscripts, azures (ultramarine blue sections) were often left blank and filled in last by the most skilled, expensive artists—you can sometimes see unfinished medieval books where the azures are still missing!
Complete word intelligence in one call. Free tier — 50 lookups/day.