1. Of a blue-gray or grayish-blue color; having a dull bluish-gray hue.
Usage: botanical and zoological term; formal or technical

Examples

• The caesious plumage of the pigeon blended seamlessly with the overcast sky.
• Botanists noted the caesious coating on the leaves of certain desert plants.
• The caesious tones in the bird's feathers provided excellent camouflage.
• Under the microscope, the caesious surface of the insect's wing was clearly visible.
• The artist mixed pigments to achieve a caesious shade for the landscape painting.