iris

The term refers to a circular diaphragm, whether biological or mechanical, that regulates light. In anatomy, it is the pigmented part of the eye; in optics, it is the adjustable aperture of a lens. Both usages share the same conceptual image of a contracting and expanding ring. When referring to the flower, the word evokes a sense of elegance and vivid color. In botanical contexts, it is often associated with spring gardens and specific color palettes like deep purple or gold.