Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
An area in the pigmented layer of the choroid coat of the eyein many animals, which has an iridescent or metallic luster and helpsto make the eye visible in the dark. Sometimes applied to the wholelayer of pigmented epithelium of the choroid.
