Citations:irides

Noun (plural): contractile membrane of the eye

 * 1843, The Penny Cyclopaedia of the Society for the Diffusion of Useful Knowledge
 * In colour the irides are straw-yellow, the pupils black; forehead, nape, and back, very dark bluish-black; [...]
 * 1904, William Henry Hudson, Green Mansions, Chapter XI
 * the soft red of her irides shone like fire, her delicate skin seemed to glow with an intense rose-colour, and her frame trembled with her agitation,
 * 1989, Robert S Ridgely, The Birds of South America
 * As in the caciques, bills are sharply pointed and pale, while irides are usually pale blue.
 * 2001, John V Forrester et al., The Eye
 * Later in life brown irides are the result of heavily pigmented melanocytes within the stroma.