Having a bluish-gray or slate-gray color; resembling the color of cesium or having a grayish-blue hue.
From Latin caesius meaning 'bluish-gray' or 'blue-eyed,' influenced by cesium, a metallic element. The term describes something that has the characteristic color of certain minerals or metals.
The word cesium itself comes from Latin caesius, so cesious creates a neat linguistic loop—describing something with the color that inspired the element's very name!
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