1. Referring to a deep blue color, like the sky on a clear day.
2. Azure; sky-blue.
3. The Latin word was applied by Roman authors to the sky, the Mediterranean, and occasionally to leaves or fields.

1. A light-blue to strong greenish-blue color.
2. A pigment used in painting consisting mainly of oxides of tin and cobalt, chiefly characterized by its greenish-blue color and permanence.

A congenital cataract with bluish coloring and radial lesions; appears to be at least sometimes autosomal dominant (requiring only one affected parent to have the trait to pass it to offspring).